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Tag: US200521
This Day in Patent History - On February 19, 1878, Thomas Edison received a patent for the phonograph
On February 19, 1878, Thomas Edison received a patent for the phonograph. The photo shows Thomas Edison with his patented phonograph.The device could mechanically record…
Phonograph
Patent Information Publication number: US200521 A Patent Title: Improvement in phonograph or speaking machines Publication type: Grant Publication date: Feb 19, 1878 Filing date:…