mimeograph

What are the differences in a hectograph, a mimeograph and multigraph?

The mimeograph was the same idea in a totally different form.

He used to run a typewriter in college, and the convalescents could mimeograph it and sell it.

One would have thought that printing had never been invented, nor even the mimeograph.

So it also is in regard to the mimeograph, whose forerunner, the electric pen, was born of Edison's brain in 1877.