This is said to be the first commercially produced electric motor, says Ward Harris, San Francisco businessman who has a collection of Thomas Edison's inventions, February 7, 1949. Photo shows the Edison electric pen, a stencil needle powered by the batteries in the background. As the user writes in the usual manner, the needle jabbed holes in the paper which was used as a stencil by applying ink with a hand roller. (Photo by Ernest K. Bennett/AP Photo)
