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Filed: Jun. 23, 1906
Issued: Mar 5, 1907
Inventor: Zardia Crain
Assignees: Daniel Bower and A.J. Woodard
Even a century ago, enterprising individuals and companies were creating accessories to go with those new fangled computing devices and adding machines. Zardia Crain's book holder for adding machines was just such an invention.
Image taken from U.S. Patent 846,012 - Digitized by Google