1870, invented the universal printing press.
1872- 1876, he invented electric animation telegraph, automatic recording telegraph, double and quadruple telegraph, and made wax paper carbon resistors.
1875, the acoustic analysis resonator was invented.
1876, he invented the carbon rod transmitter and applied for the patent of automatic telegraph.
1877, the telephone invented by Bell was improved and put into practical use in Monroe Park. Obtained three patents: puncture pen, pneumatic stylus and ordinary stylus. On August 20th, the phonograph was invented, which proved to be Edison's favorite project.
1878, the electric light was invented.
1879 ——1880, after many hardships, invented the high resistance incandescent lamp, improved the generator, designed a new current distribution method, circuit arrangement and calculation method, invented the electric lamp holder and switch, and invented the magnetic ore separation method.
1879 On August 30th, Edison and Bell respectively demonstrated the telephone installation in the town hall of Saratoga Creek. Therefore, Edison's telephone number is clear in Bibel. 2 10 year1on October 30th, he invented the incandescent lamp with high resistance.
1882, the present three-wire distribution system was invented.
1887 ——1890, improved cylinder phonograph.
1888, invented the phonograph.
1889, a variety of electrified railways were invented.
1909, the research of storage battery which lasted for ten years was finally successful.
1910-1914 years, the disc phonograph was completed without damaging records and diamond records.
19 10 years, invented the "disc record".
19 12 years, invented "talking movies" and invented the phonograph.
1914-1915, invented the comprehensive manufacturing method of carbonic acid, and combined the phonograph with the dictation recorder as a teletypewriter. A phone call can automatically record the other person's speech, making benzene, indigo oil and so on. Alone.
In1915-1918, as many as 39 inventions were completed, the most famous of which were torpedo mechanism, flamethrower and underwater periscope.
1928 successfully extracted rubber from weeds.