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Dzus fastener, from US Patent 1955740.png 491 × 737; 111 KB Electrovoice-constant-directivity-horn-1975.jpg 672 × 537; 42 KB Ellipsoid Patent.jpg 383 × 329; 86 KB
Under the Patent Act of 1793, the United States barred foreign inventors from receiving patents at the same time as granting patents to Americans who had pirated technology from other countries. “America thus became, by national policy and legislative act, the world’s premier legal sanctuary for industrial pirates.
The X generally appears at the end of the numbers hand-written on full-page patent images; however, in patent collections and for search purposes, the X is considered to be the patent type – analogous to the "D" of design patents – and appears at the beginning of the number.
The large size of the US economy, the strong pro-patentee legal regime and over 200 years of case law make US patents more valuable and more litigated than patents of any other country. The long history of patents and strong protection of patent holders contributes to abuse of the system by patent trolls , which are largely absent in other ...
{} links to the incomplete Google Patents search, by default. With the optional src parameter it will link to the more complete online USPTO patent application with TIFF images for pre-1976 patents and full-text for post 1976 patents. The Google search may provide a PDF transcript of the text extracted from the TIFF images.
English: U.S. Patent and Trademark Office filing by Charles Darrow for a patent on the board game Monopoly, filed August 31, 1935 and granted December 31, 1935.While the images and text of this patent are public domain, Parker Brothers/Hasbro still hold trademarks on specific design elements of the game, including but not limited to the general game board design, the locomotive silhouettes ...
Wikipedia entry for Google Patents.Google Patents is a search engine from Google that indexes patents and patent applications from the United States Patent and Trademark Office.
Patent model of Eli Whitney’s cotton gin. A patent model was a handmade miniature model no larger than 12" by 12" by 12" (approximately 30 cm by 30 cm by 30 cm) that showed how an invention works. It was one of the most interesting early features of the United States patent system. [1]