XTF Search Results (docsPerPage=100;f1-subject=Patent extensions -- United States;smode=simple;subject=Patents -- United States;subject-join=exact)

http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f1-subject=Patent extensions -- United States;smode=simple;subject=Patents -- United States;subject-join=exact) http://catalog.wrhs.org/collections/search?docsPerPage%3D100;f1-subject%3DPatent%20extensions%20--%20United%20States;smode%3Dsimple;subject%3DPatents%20--%20United%20States;subject-join%3Dexact Results for your query: docsPerPage=100;f1-subject=Patent extensions -- United States;smode=simple;subject=Patents -- United States;subject-join=exact Thu, 01 Jan 1970 12:00:00 GMT Additional improvement patents, 1837-1861. United States National Archives and Records Service., Paulauskas, James A., 1929- http://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://catalog.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT