Which invention was submitted for a patent on Valentine’s Day of 1876?
Answer: Alexander Graham Bell’s wife had Valentine’s Day all to herself in 1876, as her husband spent the day filing his patent for the telephone. Bell’s patent filing beat a similar claim by Elisha Gray by only two hours. On March 7, 1876, Alexander Graham Bell received a patent for the telephone; three days later, he and associate Thomas Watson successfully tested their invention. Elisha Gray, Antonio Meucci and Thomas Edison all claimed to have invented the telephone first, and the issue is still a source of controversy.