Patents > Guidance, Tools, and Manuals > Classification > USPC Index

Class Numbers & Titles   | Class Numbers Only   | USPC Index   | International   | HELP

You are viewing an Index to the USPC.

View as PDF

K Acid .....................................  562 / 71 

K Guns .....................................  89 / 1.1 

Kaleidoscopes ..............................  359 / 616+ 
    Design .................................  D21 / 439+ 
    Kaleidoscopic exhibitions ..............  359 / 616+ 

Kalsomines .................................  106 

Kanamycin ..................................  536 / 13.7+ 

Kaolin (See  Clay)   

Karaya Gum .................................  536 / 114 

Kauri Gum ..................................  530 / 203 

Kayaks .....................................  114 / 347 
    Design .................................  D12 / 302 

Keels   
    Blocks for ships in dry dock ...........  405 / 7 
    Rudders mounted on or below keel .......  114 / 149 
    Ship ...................................  114 / 140+ 

Keenes Cement ..............................  106 / 777 

Keepers   
    Lock or latch ..........................  292 / 340+ 
        Casing interfitting for ............  70 / 102 
        Swinging door ......................  70 / 102 
        Extensible for sliding door ........  70 / 96+ 
    Movable checkhook ......................  54 / 62 

Kefir ......................................  426 / 583 

Keg See Barrel   

Kelly ......................................  464 / 163 

Kelp   
    Alkali metal inorganic .................  423 / 179+ 
    Recovery from ..........................  423 / 179+ 
    Iodine recovery from ...................  423 / 500 

Kennels ....................................  119 / 482+ 
    Window .................................  119 / 484 

Keratins ...................................  530 / 357 
    Fermentative treatment .................  435 / 272+ 

Kerf   
    Cutting   
        Mining or disintegrating ...........  299 
        In situ ............................  299 
        Woodworking ........................  144 / 136.1+ 
    Guide ..................................  83 / 102.1 
    Spreading ..............................  83 / 102.1 

Ketchup See Catsup   

Ketenes ....................................  568 / 301+ 

Ketimines ..................................  564 / 271+ 
    Acyclic ................................  564 / 276+ 
    Aromatic ...............................  564 / 271 

Ketol ......................................  568 / 414+ 

Ketole (See Indole)   

Ketones ....................................  568 / 303+ 
    Carboxylic acid esters   
        Acyclic ............................  560 / 174+ 
        Alicyclic ..........................  560 / 126 
        Aromatic ...........................  560 / 51+ 
    Ketone bodies ..........................  436 / 128 
    Preparation of .........................  568 / 303+ 

Ketoximes ..................................  564 / 253+ 

Kettle See Pot .............................  220 / 573.1+ 
    Drums ..................................  84 / 419 
    Furnace ................................  126 / 345+ 
    Open top liquid heating vessel .........  126 / 373.1+ 

Key   
    Board   
        Code generator .....................  341 / 22+ 
        Controlled light valves with .......  250 / 227.22 
        Light conductors ...................  250 / 227.22 
        Design .............................  D14 / 399+ 
        Display control ....................  345 / 168+ 
        Electric signal systems ............  341 / 22+ 
            Housing or mounting assembly ...  361 / 680 
            Keyboard actvated display ......  345 / 168+ 
        Musical instrument transposer ......  84 / 445 
        Musical instruments ................  84 / 423 R+ 
            Design .........................  D17 / 1+ 
            For accordions .................  984 / 148 
            For pianos .....................  984 / 61 
        Operation training .................  434 / 227+ 
            For organs or harmoniums .......  984 / 13 
        Point of sale device ...............  705 / 25 
        Punch machine, selective ...........  234 / 123+ 
        Registers ..........................  235 / 145 R+ 
        Registers key locks ................  235 / 27 
        Switches, mechanically actuated, ...  200 
        General ............................  200 
        Typewriter .........................  400 / 472+ 
        Typewriter key levers ..............  400 / 496+ 
        Typewriter key locks ...............  400 / 663+ 
    Can opening ............................  220 / 274+ 
    Clock winding ..........................  D08 / 347+ 
    Clock winding ..........................  968 / 24+ 
    Code instruction .......................  434 / 222+ 
    Controlled closure .....................  220 / 210 
    Controlled musical instruments .........  84 / 1+ 
        Automatic players ..................  84 / 2+ 
    Cotter type ............................  411 / 513+ 
        Nail lock ..........................  411 / 356+ 
    Electric   
        Signal box transmission ............  340 / 287+ 
        Switch .............................  200 
        Telegraph ..........................  178 / 101+ 
        Telephone ..........................  379 / 251+ 
    Holders ................................  70 / 456 R+ 
        Case ...............................  206 / 37.1+ 
        Design, cases or rings .............  D03 / 207+ 
        With light .........................  362 / 116 
    Hole   
        Alarm ..............................  116 / 80 
        Cover ..............................  70 / 455 
        Escutcheons ........................  70 / 452 
        Guards .............................  70 / 423+ 
        Illuminator ........................  362 / 100 
    Horological apparatus ..................  81 / 122+ 
        Making .............................  76 / 114 
        Winding attached ...................  368 / 214 
    Identification tags ....................  283 / 74+ 
    Lock illuminator .......................  362 / 100 
    Lock type (see  key hole) ..............  70 / 393+ 
        Alarm ..............................  116 / 80 
        Cutting by milling .................  409 / 89+ 
        Design .............................  D08 / 347+ 
        Holders ............................  70 / 456 R+ 
        Identification .....................  70 / 460 
        Insertion guide ....................  70 / 454 
        Processes and blanks ...............  76 / 110 
    Locking bolt or nut to substructure   
        Laterally introduced key ...........  411 / 137 
        Longitudianal key ..................  411 / 110 
    Locking bolt to nut   
        Elongated key, disposed axially ....  411 / 216 
        Elongated key, disposed axially ....  411 / 321 
        Laterally movable key ..............  411 / 199 
        Laterally movable key ..............  411 / 209 
        Laterally movable key ..............  411 / 315 
        Received in each of plural nuts ....  411 / 224 
        Swingable key ......................  411 / 205 
        Used with thread lock   
            Longitudinal key ...............  411 / 292 
            Radial key .....................  411 / 294 
            Tangential key .................  411 / 300 
    Mechanism   
        Bowed stringed instruments .........  84 / 315+ 
        Plucked stringed instruments .......  84 / 320+ 
    Morse ..................................  178 / 101+ 
    Operated (see device operated)   
    Rail joints utilizing ..................  238 / 151+ 
    Railway wheel tire fastening ...........  295 / 19 
    Ring or fob ............................  D03 / 207+ 
    Seater .................................  409 / 190 
    Telegraph ..............................  178 / 101+ 
        Design .............................  D14 / 456 
    Torque transmitting ....................  403 / 355+ 
        Pullers ............................  29 / 250 
        Slidable for gearing ...............  74 / 356+ 

Keyed Block (See  Block)   

Keyer   
    In transmitter .........................  375 / 309+ 
        Alternating current telegraphy .....  178 / 66.2 
    Miscellaneous electronic device ........  327 / 185+ 
    Type ...................................  327 / 185+ 

Keystone Blocks ............................  52 / 575 

Kick Plate .................................  16 / 402 
    Kick guard .............................  16 / DIG 2 

Kicker .....................................  83 / 707+ 

Kickers and Blowing Agent Moderators   
    (See synthetic resin or natural   
    Rubber)   

Kier Treatment of Fibers ...................  8 / 157 

Kiln .......................................  432 / 120+ 
    Carbonizing ............................  202 
    Drying .................................  34 / 201+ 
    Kiln ...................................  D15 / 144.1 

Kimonos ....................................  2 / 74 

Kindler   
    Composition ............................  44 / 542+ 

Kinematographic Apparatus   
    (See  motion picture)   

Kinescope   
    Cathode ray tube .......................  313 / 364+ 
    Motion picture .........................  352 / 129 
    Television system using ................  348 / 805+ 

Kinesitherapy ..............................  601 / 1+ 
    Design .................................  D24 / 200+ 

King Pin ...................................  403 

Kingbolts ..................................  72 / 472 

Kiosks .....................................  52 / 361+ 

Kitchen   
    Cabinets ...............................  312 
        With sifter ........................  312 / 210.5 
    Utensils ...............................  D07 / 368+ 

Kites ......................................  244 / 153 R+ 
    Design .................................  D21 / 445+ 

Kits   
    Camp ...................................  206 / 541+ 
        Convertible to table ...............  190 / 12 A 
    Diagnostic .............................  206 / 569 
    Lunch ..................................  206 / 541+ 
    Mess ...................................  206 / 541+ 
    Photographic ...........................  396 / 519+ 
    Pocket stove ...........................  126 / 38 
    Signal for trainmen ....................  246 / 488 
    Toilet kit .............................  132 / 286+ 
        Absent special toilet articles .....  401 / 118 
        Eg, mirror .........................  401 / 118+ 

Klystron ...................................  315 / 5+ 
    Amplifier ..............................  330 / 45 
    Demodulator ............................  329 
    Modulator ..............................  332 
    Oscillator .............................  331 / 83 
    Reflex .................................  315 / 5.18+ 

Knapsack ...................................  224 / 627+ 
    Backpack convertible to other ..........  224 / 153 
    Devise .................................  224 / 153 
    With belt ..............................  224 / 637+ 

Kneader (See  Mixer)   
    Bread board ............................  269 / 302.1 
    Bread, pastry or confection ............  366 / 69+ 
        Implements .........................  416 / 70 R 
    Surgical ...............................  601 / 134+ 
    Vulcanizable gums   
        Apparatus ..........................  425 / 197+ 
        Apparatus ..........................  425 / 200+ 

Knee   
    Action   
        Kneeling bus suspension ............  280 / 6.152 
        Running gear .......................  280 / 5.5+ 
        Active suspension control ..........  280 / 5.5+ 
        Running gear .......................  280 / 124.1+ 
        Mechanical arrangements ............  280 / 124.1+ 
        Shaft transmission mechanism .......  180 / 348+ 
        Combined ...........................  180 / 348+ 
        Vehicle spring devices .............  267 / 228+ 
    Artificial .............................  623 / 39+ 
        Knee bone ..........................  623 / 20.14+ 
    Garment protectors .....................  2 / 62 
    Length trousers or overalls ............  2 / 228 
    Lock for composing stick ...............  276 / 39 
    Operated control lever or linkage ......  74 / 515 R 
    Pads or rests ..........................  2 / 24 
    Ship ...................................  114 / 87 
    Support surgical table combined ........  269 
    Vehicle runner .........................  280 / 27 

Kneehole Desk ..............................  312 / 194+ 

Knife   
    Box or holder ..........................  D07 / 637 
    Changing ...............................  83 / 954* 
    Cutlery ................................  30 / 138+ 
    Cutting ................................  76 / 82+ 
    Design .................................  D07 / 649+ 
    Electric or battery driven .............  D07 / 646 
    Hand manipulable cutting ...............  30 
        Additional tool combined ...........  7 / 151+ 
    Handles ................................  D08 / DIG 4 
    Harvester ..............................  451 / 128 
        Clamp ..............................  451 / 372+ 
    Holder, body or belt attached ..........  224 / 232 
    Knife edge texturing ...................  28 / 260 
    Machette or hunting knife ..............  D22 / 118 
    Machine knife in situ ..................  451 / 419+ 
    Processes ..............................  451 / 45 
    Rest ...................................  248 / 37.3+ 
    Sharpener attachment for food mixer ....  D08 / 35 
    Sharpener, powered .....................  D08 / 63 
    Snap type ..............................  200 / 472 
    Solid material comminution .............  241 / 291+ 
    Swaging ................................  76 / 89.2 
    Switch, knife blade ....................  200 / 554+ 

Knit Fabrics and Articles ..................  66 / 169 R+ 
    Caps ...................................  2 / 195.8 
    Design .................................  D05 / 47+ 
    Knit-deknit texturing ..................  28 / 218 
    Neckties ...............................  2 / 147 

Knitting   
    Darning ................................  66 / 2 
    Design .................................  D05 / 11+ 
    Fabric manipulation ....................  66 / 147+ 
    Fabric or article ......................  66 / 169 R+ 
    Feeding ................................  66 / 125 R+ 
    Looper pin & hook ......................  66 / 3+ 
    Machines   
        Elements ...........................  66 / 90+ 
    Needles see needle & needle ............  66 / 116+ 
        Independent needle machines ........  66 / 7+ 
        Needle beds ........................  66 / 114+ 
        Needle cooperating elements ........  66 / 90+ 
        United needle machines .............  66 / 78+ 
    Pattern mechanism ......................  66 / 231+ 
    Reknitting .............................  66 / 1.5 
    Sheaths ................................  30 / 151+ 
    Stopping ...............................  66 / 157+ 
        Additional tool combined ...........  7 / 158+ 

Knobs ......................................  16 / 441+ 
    Bed post ornament ......................  5 / 281 
    Combination lock operator ..............  70 / 445 
    Door ...................................  292 / 347 
        Attaching devices ..................  292 / 348+ 
        Bearings ...........................  292 / 356 
        Design .............................  D08 / 300+ 
        Miscellaneous hardware .............  16 / 414 
        Miscellaneous hardware .............  16 / 441+ 
        Rose plates ........................  292 / 357 
    Insulated ..............................  16 / 433 
    Label combined .........................  40 / 331+ 
    Lock combined ..........................  70 / 207+ 
    Machine element ........................  74 / 553 
    Making   
        Deforming sheet metal ..............  72 
        Metal ..............................  29 / 896.5 
    Pull or ................................  D08 / 300+ 
    Signal combined (see  knob) ............  116 

Knockdown   
    Beds and cots ..........................  5 
    Box wooden .............................  217 / 12 R+ 
    Bureaus ................................  312 / 266+ 
    Cabinets ...............................  312 / 257.1+ 
    Cooking rack ...........................  99 / 449 
    Crate wooden ...........................  217 / 43 R+ 
    Desks kneehole type ....................  312 / 195 
    Foundry core bar .......................  164 / 400 
    Freight car ............................  105 / 363 
    Hand rake ..............................  56 / 400.19+ 
    Hold knife or razor ....................  30 / 332 
    Ladder .................................  182 / 194 
    Pedestal table .........................  108 / 150 
    Picture frames .........................  40 / 779 
    Razor ..................................  30 / 47 
    Reel ...................................  242 / 407.1 
        Spool ..............................  242 / 607+ 
    Sifter support .........................  209 / 414 
    Stand ..................................  248 / 529 
        Plural leg .........................  248 / 165 
        Receptacle .........................  248 / 150 
    Stoves .................................  126 / 9 R 
    Toys ...................................  446 / 85+ 
    Velocipede .............................  280 / 278 
        Frames .............................  280 / 287 
    Weighing scale .........................  177 / 126+ 

Knockers   
    Boll hulling combined ..................  19 / 37 
        Breaker combined ...................  19 / 36 
    Cable hoist ............................  212 / 116 
    Door ...................................  D08 / 401 
    Sifting element ........................  209 / 382 

Knockouts ..................................  220 / 265+ 

Knot and Knotting (See  Tying) .............  289 
    Book sewing machine ....................  112 / 22 
    Detector ...............................  28 / 227 
    Harvester   
        Compressing and binding ............  56 / 433+ 
        Cutting conveying and binding ......  56 / 131+ 
        Raking and bundling ................  56 / 343 
    Mesh fabric ............................  87 / 53 
        Making .............................  87 / 12 
    Necktie ................................  2 / 148+ 
    Sash cord ..............................  16 / 207 
    Sewing machine stitch former ...........  112 / 156 
    Strand joint ...........................  403 
    Wireworking ............................  140 / 101 

Knowledge Processing .......................  706 / 45+ 
    Applications ...........................  706 / 902* 
    Creation or modification ...............  706 / 59+ 
    Knowledge representation and ...........  706 / 46 
    Reasoning technique ....................  706 / 46 

Knuckle ....................................  213 / 100 R+ 

Knurling Metal .............................  72 / 703* 
    By rolling .............................  72 / 191+ 
    Methods & apparatus ....................  29 / DIG 23 

KRATON™    (See Synthetic Resin or   
    Natural rubber)   

Kraut ......................................  426 
    Canned .................................  426 / 131 

Kyropoulos Type Crystallization ............  117 / 11+ 

This page is produced by the Office of Classification Support (Office of Patent Classification) for the Reference Tools Project.

Please send questions and comments to usptoinfo@uspto.gov .

Note: The Patent and Trademark Depository Library Program (PTDLP) administers a nationwide network of public, state and academic libraries designated as Patent and Trademark Depository Libraries authorized by 35 U.S.C. 13 to: Disseminate Patent and Trademark Information Support Diverse Intellectual Property Needs of the Public. PTDL Contact Information

Note: For information/comments on electronic information products, such as purchasing USPTO data, or to discuss system requirements for magnetic tape products, contact:

     Information Products Division -- U.S. Patent and Trademark Office Information Products Division Contact Information
     Or, browse their on-line catalog.

KEY: =online business system =fees =forms=help =laws/regulations =definition (glossary) The Inventors Assistance Center is available to help you on patent matters.Send questions about USPTO programs and services to the USPTO Contact Center (UCC). You can suggest USPTO webpages or material you would like featured on this section by E-mail to the webmaster@uspto.gov. While we cannot promise to accommodate all requests, your suggestions will be considered and may lead to other improvements on the website.