Who made the 2nd telephone?

Answer 1

Well, literally, one telephone by itself is of no use - so presumably the guy who invented the first.

A more interesting question might be "who invented the telephone second?" which is subtly different. The problem is that we can't be absolutely certain who invented the telephone first. Alexander Graham Bell usually gets the credit, but another inventor (Elisha Gray) invented a sort of telephone at very nearly the same time, and there were some ... let's call them "shenanigans" ... involved with their attempts to patent them. Gray's lawyer filed a "patent caveat" on the same day that Bell's lawyer filed a patent application, but Bell's application was reviewed first. Bell was very much aware of Gray, and the telephone as described in Bell's patent application didn't work (it could transmit some sounds, but not intelligible voice). The first of Bell's telephones that actually could transmit a voice that could be understood at the other end (the famous "Watson, come here" telephone) used a microphone that was quite similar to the one in Gray's patent.