February 15, 2002
#02-13
Patent for Phonograph Issued February 19, 1878
Patent for Phonograph Issued February 19, 1878 One of Edison's first great inventions
PRESS RELEASE
Thomas A. Edison, one of the outstanding geniuses in the
history of technology, received patent no. 200,521 for a
phonograph on February 19, 1878. This patent is just one of the
more than one thousand Edison was granted for his inventions.
Edison was exceptionally inquisitive, and while tinkering with
the telegraph transmitter he discovered that when played back
at high speeds, the tape sounded like spoken words. He figured
out that the human voice, and other sounds, could cause a light
material plate to vibrate. And, when properly placed, a needle
could indent the plate, recording the vibrations, and found
that yet another needle could play them back. He eventually
rigged a tinfoil cylinder and a stylus with which he recorded,
"Mary Had a Little Lamb."
Edison's inventions have been a mainstay of our economy for
over 100 years. At the turn of the 20th century, Edison's New
Jersey laboratory (now a national monument), was the hub around
which factories employing 5,000 people produced new products,
including the mimeograph, the fluoroscope, the alkaline storage
battery, dictating machines, and motion picture cameras and
projectors. The electric light bulb, his most famous invention,
was the foundation for today's General Electric Company.
Edison's phonograph patent, as well as the more than six
million patents issued since the first in 1790 and the 2.3
million trademarks registered since 1870, can be seen on the
Department of Commerce's U.S. Patent and Trademark Office Web
site at
www.uspto.gov
.
Last year USPTO issued 187,824 patents and registered
102,314 trademarks.
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