GK
INVENTIONS
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 Question 
 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
 
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 Who filed and received a patent for the harmonic telegraph 
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  Alexander Graham Bell 
 
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  Elisha Gray 
 
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  Henry Ford 
 
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  Karl Benz 
 
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 Explanation: 
Detailed explanation-1: -On February 14, Gray’s lawyer filed a patent caveat with a similar diagram. The same day, Bell’s lawyer filed (hand-delivered to the U.S. Patent Office) a patent application on the harmonic telegraph, including its use for transmitting vocal sounds.
Detailed explanation-2: -Alexander Graham Bell’s Telephone Patent Drawing On March 7, 1876, Alexander Graham Bell received a patent for his “improvements in Telegraphy."
Detailed explanation-3: -Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois.
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