In 1909 Mr. Conn was issued a patent for his invention from the United States Patent & Trademark Office (USPTO). There were 2 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, Charles G. Conn, a citizen of the United States, residing at Elkhart, in the county of Elkhart and State of Indiana, have invented certain new and useful Improvements in Bell-Mutes for Cornets, of which the following is a specification. In the drawing, Figure 1 is a side elevation of a mute, embodying my invention; Fig. 2 is a longitudinal cross sectional view of the same. 1 represents the mute which is shown as substantially pear shaped. The smaller end of the mute is adapted to engage the walls of the bell tube of a cornet, and to provide a tight joint between the walls of the cornet and the mute, I secure a piece 3 of soft leather, felt or similar material, whereby a strong frictional joint is secured."…