On December 10, 1898, Leamon G. Souder patented an escalator. This was the first of the four escalator-style patents issued to Souder, including two for…
On December 9, 1884, L. M. Richardson patented roller skates with ball bearings. This allowed skaters to gain speed with less efforts. This invention transformed…
On December 8, 1891, Samuel F. O’Reilly patented the first electric tattoo machine based on Thomas A. Edison’s autographic printing pen. He is known as…
On December 7, 1880, Alexander Graham Bell patented photophone, which allowed for the transmission of speech on a beam of light. Bell believed the photophone…
On December 6, 1892, W. Kales patented physician’s table. Patent Information Publication number: US487625 A Patent Title: Physician s table Publication type: Grant Publication date:…
On December 4, 1934, idiosyncratic designer Charles James received a patent for a scarf. …
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