Who filed a similar patent application on the exact same day Bell filed his, February 14, 1876?

Answer

Elisha Gray.

Bell filed his patent application on February 14, 1876, and the text notes that a similar patent application from Elisha Gray was filed on the very same day, though Bell’s was filed mere hours earlier.

Who filed a similar patent application on the exact same day Bell filed his, February 14, 1876?
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