list
out the measures undertaken for the removal of regional imbalance
Answers
Answered by
1
Alexander Graham Bell was awarded the first U.S. patent for the invention of the telephone in 1876. Elisha Gray, 1876, designed a telephone using a water microphone in Highland Park, Illinois. ... Thomas Edison invented the carbon microphone which produced a strong telephone signal.
Answered by
11
Answer:
hope it will helps you....♡♡♡
Attachments:
Similar questions