I believe this item is an authentic file at the patent office after approval of a patent application to the United States Patent Office for Combined Electro, Vapor, and Warm Air Bath. The lot comprises single card stock sheet of paper with signed in print letter filed  Feb 13, 1884 from the applicant w  full page illustrations of the bath. The illustrations have a patent date of Nov 11, 1884. ~7.50in x 11in. In protective sleeve. Would look great framed. You can get an authentic period piece for less than modern reproduction. If you are interested paper memorabilia, please check out others items I have for bids. We do combine, when possible, like items, to save on shipping(8). (9-11-22)