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For example, objects identified by the numbers 11.000 through 11.999 may indicate objects obtained by the museum in 1911; the first 300 numbers might be used to indicate American art, while the next fifty (11.301–350) might be used for African art. In some cases, they also include letters and other punctuation, such as commas, hyphens or slashes.
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.
Patents issued under revised numbering scheme of the Patent Act of 1836; Patent Number Patent Title Issue Date Days Since Last Millionth Issue 1 [67] Traction Wheels: July 13, 1836 1,000,000 [68] Vehicle Tire: August 8, 1911: 27,419 2,000,000 [69] Vehicle Wheel Construction: May 12, 1932: 7,583 3,000,000 [70] Automatic Reading System: May 6 ...
Chronological dating, or simply dating, is the process of attributing to an object or event a date in the past, ...
The filing date of a patent application is the date the patent application was filed in one or more patent offices, i.e. the date on which that application is legally accepted at the patent office. That date is typically the date on which the documents are deposited at the office, but may be later if there are defects in the documents.
Otis King's patent calculator, model K; Photo by Richard Lyon. Otis Carter Formby King (1876–1944) was an electrical engineer [1] in London who invented and produced a cylindrical slide rule with helical scales, primarily for business uses initially. The product was named Otis King's Patent Calculator, and was manufactured and sold by Carbic ...
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The Derwent World Patents Index (DWPI) is a database containing patent applications and grants from 44 of the world's patent issuing authorities. [1] [2]Compiled in English by editorial staff, the database provides a short abstract detailing the nature and use of the invention described in a patent and is indexed into alphanumeric technology categories to allow retrieval of relevant patent ...