On January 26, 1879, who was granted a patent for r an electric lamp using a carbon filament or strip coiled and connected to platina contact wires?
on january 26, 1879, who was granted a patent for r an electric lamp using a carbon filament or strip coiled and connected to platina contact wires
FreebaseQA-train-3940.P0
carbon filament
incandescent light bulb
m.0cpk7
law.invention.inventor
m.07bty
thomas edison