Partly-printed DS, signed twice, “Thos. A. Edison,” one page, 10.25 x 5.75, September 25, 1888. Stock certificate for 20 and 821/1000 shares in Edison Phonograph Works issued to Thomas A. Edison, signed at the conclusion in ink by Edison as the company's president; signed again on the reverse by Edison to transfer the shares. The original receipt has been affixed to the left side. In fine condition.
In 1877, when Edison invented the phonograph, the first device for recording and playing back sound, he thought that its main use would be to record speech in business settings, which could then be played back and transcribed. Beginning to improve upon the phonograph and recording media in the 1880s, Edison pioneered the use of wax cylinders as a means of sound recording and reproduction. Edison's phonograph would eventually be adopted primarily for entertainment purposes, bringing music into millions of American households. A holder of over 1,000 patents, Edison considered the phonograph to be his favorite invention.
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