ARTICLES

The phonograph, invented by Thomas Edison in 1877, was intended as a recording device to complement the telephone. After working with the telegraph, another Edison invention, he noted that the messages could be written d...

www.reference.com/article/history-phonograph-7267e6bcafbe613

Silvertone phonographs have sold online and at auction for between $30 and $400 as of 2015. The value depends on a variety of factors including age, condition, patent date and the quality of any refinishing work. Prospec...

www.reference.com/world-view/can-figure-out-value-silvertone-phonograph-cfe69dca5408530f

Underwriters Laboratories has been doing business since 1894 when its founder, William Henry Merrill, opened the Underwriters' Electrical Bureau of the National Board of Fire Underwriters, notes UL.com. The first test co...

www.reference.com/article/history-underwriters-laboratories-a4e97a240955f438

SIMILAR ARTICLES

Thomas Alva Edison was an American inventor whose most important contributions were the electric light bulb and phonograph. He held a world record number of invention patents —1093.

www.reference.com/article/important-contributions-thomas-edison-59d54618fe3313e2

The very first machine that could play back music was the phonograph, which was created by Thomas Edison, but it went through several changes before it was able to play the flat recorded disks that became known as record...

www.reference.com/article/invented-first-record-player-da0ef6068604736c

Thomas Edison is credited with inventing the phonograph, completing his first model on August 12, 1877. Edison's creation was inspired by his work on improvements to the telephone and telegraph.

www.reference.com/article/invented-phonograph-57b0f9323680ae5c

The first working loudspeaker was invented by Alexander Graham Bell who incorporated the device into his other famous invention, the telephone. Bell was awarded the patent for the telephone in 1876 with the loudspeaker d...

www.reference.com/history/invented-first-loudspeaker-2c60f42151e31957