Which came first, the lightbulb or the telephone?

the telephone came first, by 3 years. Bell was granted US patent 174,465.

Side by side

the lightbulb

Edison did not invent the electric light. Humphry Davy demonstrated an arc lamp in 1802, and at least twenty inventors produced incandescent bulbs before him; Joseph Swan demonstrated one in Newcastle in 1878 and was granted a British patent, which is why Edison eventually had to merge with him as Ediswan. What Edison produced in October 1879 was a bulb that lasted long enough and cost little enough to sell, together with the generating and wiring system to make it useful.

the telephone

Bell's patent was granted on 7 March 1876 and he made the famous call to Watson three days later. Elisha Gray filed a caveat for a similar device on the same day in February that Bell filed his application, and the priority dispute has never entirely gone away. Antonio Meucci had demonstrated a working voice telegraph in New York in 1860 but could not afford to renew his caveat.