The Bassett Adder was a continuous band adding machine which was invented by James Hunter Bassett. It was in production between 1909 and 1932 and was originally sold for just $1. There were two ...

In 1897, De Kerniea James Thomas Hiett obtained a patent for a multi-column keyboard adding and printing calculator. His machine was first called the Heitt Adding and Listing Machine, and then the ...