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Patent number 443555 published 2 May 1927. [14] The patent was also applied in England [15] and Switzerland [16] in 1927. It consisted of a watch contained within a rectangular case. The timepiece own case, comprising movement, dial, winding and hand-setting mechanism, forms an autonomous unit which in turn is enclosed by a two-part metal case.
The product was named Otis King's Patent Calculator, and was manufactured and sold by Carbic Ltd. in London from about 1922 to about 1972. With a log-scale decade length of 66 inches, the Otis King calculator should be about a full digit more accurate than a 6-inch pocket slide rule. But due to inaccuracies in tic-mark placement, some portions ...
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.
Clay pipe dating is the act of dating clay tobacco pipes found at archaeological sites to specific time periods. Pipe bowl found in Kent , southeast England. The circular hole through the tube is slightly off-centre and measures 3.36mm in diameter, and would suggest a rough date of c.1610 AD.
In 2004, i.e. in the early years of Espacenet, Nancy Lambert considered that, although free, Espacenet, like the United States Patent and Trademark Office (USPTO) database of US patents, "still tend[ed] to have primitive search engines and in some cases rather cumbersome mechanisms to download patents."
Uploader determined values for 2021 and 2022 by obtaining Google Patent listings of patents issued on the first Tuesday of 2021, 2022, and 2023, and performing simple subtraction of lowest-value patent numbers. (All U.S. patents have issue dates on Tuesdays.)
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A comparatively small number of models (4,000) were the property of the Rothschild Patent Museum until 2015, when they were transferred to Hagley Museum and Library, forming a part of the museum's collection of patent models. With over 5,000 models, the Hagley's is the largest private collection, and second in size only to the Smithsonian's.