Discover how William Seward Burroughs' invention of the adding machine in the 1880s streamlined bookkeeping for businesses ...

In the early 20th century, William A. Morschhauser of New York City became the exclusive American distributor of the Millionaire calculating machine. He placed machines at several United States ...

This compact cylindrical handheld calculating machine has black metal sides and a plastic top and operating handle. Eight slots along the side of the cylinder hold levers that are pulled down to set ...

In a unanimous panel ruling, the Federal Circuit has found that the calculating machine of U.S. Patent No. 388,116 fails to meet the eligibility requirements of 35 U.S.C. § 101. Inventor W.S.