http://www.rssboard.org/rss-specification 720 http://norton.wrhs.org/collections/search?docsPerPage%3D100;f158-subject%3DPatents%20--%20United%20States. Results for your query: docsPerPage=100;f158-subject=Patents -- United States. Tue, 28 Jul 2020 12:00:00 GMT http://norton.wrhs.org/collections/view?docId=ead/MS4671.xml The George Washington patent letter may be the earliest patent issued in the United States for a self-propelled vehicle or "horseless carriage." Purchased by Frederick C. Crawford in 1951, research done at that time indicates that although this patent is listed in early patent indexes, the U.S. Patent Office has no copies of it, and no models or drawings of this invention were found. The patent certification of delivery, acceptance, and payment of application fees is signed "G. Washington by the President Edm. Randolph", with the seal of the United States affixed. http://norton.wrhs.org/collections/view?docId=ead/MS4671.xml Wed, 01 Jan 2014 12:00:00 GMT http://norton.wrhs.org/collections/view?docId=ead/MS4447.xml George Knowles was a Cleveland, Ohio, patent attorney who served as assistant executive in charge of patents in the Engineering Department of Materiel Command at Wright Field Air Corps Base (Dayton, Ohio) during World War II. Margaret Knowles was his wife. The collection consists primarily of correspondence, organizational materials, journals, and military files. The collection pertains primarily to George Knowles' military experience, involvement with patents, and organizational activities with the Cleveland Patent Law Association, Exchange Club of Euclid and the Wildwood Yacht Club. Included is a small amount of material relating to Knowles' wife, Margaret, and his nephew, Myles Knowles. http://norton.wrhs.org/collections/view?docId=ead/MS4447.xml Wed, 01 Jan 2014 12:00:00 GMT