DescriptionIn August 1937, the Edison Business Phonograph, later known as the Ediphone Voice Writing or "Ediphone" for short, celebrated its Diamond Jubilee on the occasion of its 60th Anniversary. The...
DescriptionEdison cautery batteries were specially designed to meet the large and increasing demand of physicians and surgeons for a reliable battery capable of furnishing a very heavy current for cautery work. ...
DescriptionThomas Edison began serious research into developing a practical incandescent lamp in 1878. Edison filed his first patent application for "Improvement In Electric Lights" on 14 October 1878. After...
