In 1922 Mr. Johnson was issued a patent for his invention from the United States Patent & Trademark Office (USPTO). There were 6 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 additionalsheets 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, JOHN ARTHUR JOHNSON, a citizen of the United States, and a resident of Leavenworth, in the county of Leavenworth and State of Kansas have invented certain new and useful Improvements in Wrenches, of which the following is a specification"…