The patent for Edison's Electric Pen, entitled Improvement in Autographic Printing was filed on March 13, 1876. The Electric Pen was Edison's "first experimental work in document copying and multiple duplication" (Baldwin 69). The device was invented for the niche market of business men needing to multiple copies of legal documents. The pen, however, was more versatile than for just business purposes and was popular and sold well. Beginning at the bargain price of just 35 dollars the Edison Electric Pen was marketed for any use from personal letters, music, contracts, manifestos, and artistic drawings. The pen was first sold exclusively to the east coast but quickly exanded to the midwest and to British Columbia and England. Eventually, Edison sold the rights to the Western Electric company, but the rights and patent finally ended up in the hands A.B. Dick of Chicago who developed the next reduplication invention: the mimeograph.
How the Electric Pen Works
The patent by Edison, describes the writing of the pen as, "patterns for embroidery and for fresco painters have been made of paper" (patent).