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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 178 | TELEGRAPHY |
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1 | MISCELLANEOUS |
2R | SYSTEMS |
3 | Automatic |
4 | Printing |
15 | Photographic recorder |
16 | Current reversing |
17R | Transmitters or recorders |
18.01 | Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry) |
18.02 | Error correction |
18.03 | Writing digitizer pad |
18.04 | Acoustical (e.g., vibration, ultrasonic, etc.) |
18.05 | Resistive |
18.06 | Capacitive |
18.07 | Inductive |
18.09 | Optical |
18.11 | With illumination |
19.01 | Writing digitizer stylus |
19.02 | Acoustical stylus |
19.03 | Capacitive or inductive stylus |
19.04 | Pressure stylus |
19.05 | Light pen |
19.06 | AC source |
20.01 | Writing digitizer circuit |
21 | Stenographic |
23R | Printing |
24 | Bulletin |
25 | Page |
30 | Character elements |
31 | Multiple-line circuit |
33R | Selectors |
35 | With type-wheel recorder |
36 | Recorders |
37 | Privacy (e.g., mechanical packaging or covering of printed message) |
38 | With type wheel |
42 | Paper guiding or feeding |
23A | Error detection in printers |
43 | Space induction |
45 | Loaded circuit |
47 | Harmonic or reed |
49 | Superposed current |
62 | Chemical |
63R | Cable or capacity |
63A | Cable repeaters |
63B | Cable transmitters |
63C | Cable receivers |
63D | Cable mechanical structure |
63E | Distortion correction and artificial lines |
63F | Direction reversing |
64 | Coil transformer |
65 | Dynamo |
66.1 | Alternating or pulsating current |
69R | Line-clearing and circuit maintenance |
69M | Frequency measuring and compensating |
69N | Precorrectors |
69A | Distortion measuring |
69B | Interference neutralizing |
69C | Balancing duplex cables |
69D | Zero wander neutralizers |
69E | Leakage compensation |
69F | Neutralizing line capactive discharge |
69G | Monitoring, alarm and pilot signals |
69H | Reiterative |
69K | Misc. gas-filled tube circuits |
69L | Check back |
69.6 | Call |
2A | Simplex-reversing periodic |
2B | Code changers |
2C | Way stations; party lines |
2D | Round robins |
2E | Satellite |
2F | Coin-controlled, connecting, recording |
70R | REPEATERS |
71.1 | Automatic in either direction |
72 | Mechanical circuit retainer |
73 | Multiple line |
71.2 | Distributor |
71.3 | Mechanical |
71.4 | Generator |
71.5 | Artificial line and relay |
71.6 | Vacuum tube and gas magnetron |
71.7 | Code transformer |
71.8 | Oscillatory |
71.9 | One-way repeater switched |
71.11 | Piezoelectric |
71.12 | Vacuum tube and relay |
71.13 | Relay only |
71.14 | Supervisory, alarm, monitor |
70A | Relays only |
70B | Vibrating relays |
70C | Rotary distributors |
70D | Mechanical |
70E | Tuning forks |
70F | Vacuum tubes |
70H | Gas tubes |
70M | Magnetic |
70N | Magnetron repeaters |
70P | Photocell |
70Q | Piezoelectric |
70J | Generator |
70S | Having a carrier wave input |
70T | Oscillatory |
70TS | Using transistors |
74 | CIRCUITS |
77 | COMBINED INSTRUMENTS |
79 | CODE TRANSMITTERS |
80 | Combined instruments |
82R | Automatic dot |
83 | Rotary contact |
85 | Oscillating contact |
86 | Reciprocating contact |
118 | RECEIVERS |
89 | Code recorders |
90 | Photographic |
91 | Siphon |
92 | Indenting or perforating |
93 | Polarized |
94 | Pyrographic |
95 | Stop mechanisms |
96 | Inking devices |
97 | Double-tape movement |
98 | Sounders |
119 | Optical member |
120 | With electron tube or solid-state device |
101 | KEYS |
102 | Multiple contact |
103 | Multiple line |
104 | Self-closing |
105 | Reversible |
106 | Shifting contact point |
107 | Knife-edge pivot |
108 | Horizontal swing |
109 | Spring pivot |
110 | Finger buttons |
111 | TAPES |
114 | INSTRUMENT TABLES |
115 | LEARNERS' INSTRUMENTS |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived. | ||
SYSTEMS |
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