Who was the competitor that submitted a caveat for a liquid transmitter design on the same day Bell filed for his patent?

Answer

Elisha Gray

Elisha Gray was a direct competitor working on similar telephony concepts during the same period. He submitted a legal caveat for a liquid transmitter, which involved using conductive liquids to modulate the electrical signal, on February 14, 1876. This was the identical date that the patent application for the telephone was filed, illustrating the intense race and simultaneous innovation happening in the field of electrical communication.

Who was the competitor that submitted a caveat for a liquid transmitter design on the same day Bell filed for his patent?
inventionAlexander Graham BellTelephoneinventorinspiration