By what year did the Columbia Phonograph Company, historically a cylinder proponent, begin marketing its own disc phonographs?

Answer

1902

The use of discs became so prevalent that by 1902, the Columbia Phonograph Company began marketing its own disc phonographs.

By what year did the Columbia Phonograph Company, historically a cylinder proponent, begin marketing its own disc phonographs?

#Videos

Emile Berliner, Kammer & Reinhardt Gramophones, First ... - YouTube

inventioninventorSoundgramophonedisc record