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Manufacturers Index - Keystone Forge Co.
This page contains information on patents issued to this manufacturer.

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USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
37,893 Mar. 17, 1863 Improved knapsack-sling De Witt Clinton Baxter Philadelphia, PA Before the Civil War the inventor was an engraver and artist who published the Baxter Panoramic Business Directory in Philadelphia. During the Civil War he was a Lieutenant Colonel, then Colonel, then brevet brigadier general near the end of the war. Afterwards he continued as a naval officer until 1871; after that he was involved with the Keystone (Portable) Forge Co.
"Considerable experience in military life has led me to observe the defects of the mode of attaching the ordinary knapsack, at to attempt a remedy for them, which I think I have found in the present invention. The nature of my invention consists in supporting the sack by means of strips of wood (or metal, if preferred) extending from the shoulders to the hips, in such position as to prevent all pressure upon the loins, while the weight is thrown vertically upon the person of the soldier..."
148,652 Mar. 17, 1874 Forges De Witt C. Baxter Philadelphia, PA
164,512 Jun. 15, 1875 Portable Forges De Witt Baxter Philadelphia, PA