In 1884 Mr. Johnson was issued a patent for his invention from the United States Patent & Trademark Office (USPTO). There were 3 documents on file for this patent. The drawing specification sheet of the patent has been reproduced from original USPTO documents and printed onto parchment paper. This print is sized and ready to install into an 8" x 10" frame. The additional sheets included are printed on 5.50" x 8.50" parchment paper. These accompanying documents describe the scope of this invention in formal terms. The following is an actual excerpt from the patent…

       " Be it known that I, WILLIS JOHNSON, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new nnd useful Improvements in Egg-Beaters, of which the following is a specification, reference being had therein to the accompanying drawings. The object of my invention isto provide a machine wherewith eggs, batter, and other similar ingredients used by bakers and confectioners can be beaten or mixed in the most intimate and expeditious manner. The machine consists, essentially, of a main frame within which is journaled a driving-wheel and a pinion or pulley, the horizontal shaft of the latter having at its opposite ends clutches or sockets,with which are engaged scjuare or other noncircular arbors at the inner extremities of a pair of beater-shafts"…