Bell's patent 174,465, was issued to Bell on March 7, 1876, by the U.S. Patent Office. Bell's patent covered "the method of, and apparatus for, transmitting vocal or other sounds telegraphically ... by causing electrical undulations, similar in form to the vibrations of the air accompanying the said vocal or other sound" [N 16] Bell returned to Boston the same day and the next day resumed work, drawing in his notebook a diagram similar to that in Gray's patent caveat. COUNT 5
QSN1 What number is Bell's patent? ANS1 174,465 QSN2 On what date did Bell get his patent? ANS2 March 7, 1876 QSN3 Bell's patent was for the method and what for transmitting vocal and other sounds telegraphically? ANS3 apparatus QSN4 On what day did Bell go back to Boston? ANS4 March 7, 1876 QSN5 Bell sketched a design that looked like the work of who? ANS5 Gray