1900 - 1910 Invented and perfected the steel alkaline storage battery and made it a commercial success.
1902-1903 Worked on improving the Edison Primary Battery. Continued to invent improvements to his phonograph - his favorite invention - and associated cylinders.
1856
The phonograph was invented by Thomas Edison in 1877.
The light bulb was created in 1882 by Thomas Edison.
Thomas Edison invented the light bulb in 1879.
Thomas Edison invented the phonograph in 1877.
Thomas Edison invented the lightbulb in 1879.
The phonograph was invented in 1877 by Thomas Edison.
The phonograph was invented in 1877 by Thomas Alva Edison.
Thomas Alva Edison invented the light bulb in 1877.
The phonograph was invented in 1878. Thomas Edison invented it.
Thomas Edison invented the carbon microphone in 1877
He did it in the 1880s because the sound quality of the first model was quite poor.