In 1871 Mr. Fritsche was issued a patent for this invention from the United States Patent & Trademark Office (USPTO). There are 4 documents included with 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, ANTON FRITSCHE, of the city, county, and State of New York, have invented a new and improved Clarinet and I do hereby de­dare that the following is a full, clear, and exact description thereof"…