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When invented
The phonograph was invented by Thomas Edison -
Government approval
Is when the government approved the Phonograph. -
Frist improvance of the Phonograph
This is when Alexander G Bell and his associates at Volta Laboratory panted the improved Phonograph. -
New company
The formation of the Edison Phonograph company. -
Induction of improved Phonograph
Is when the introduced the improved Phonograph. -
Explanation of manufacturers
Is when there was a significant expansion when manufactures like Volta Laboratory developed ways to mass produce wax cylinders, making record music more accessible.