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The first patent for the O-ring is dated May 12, 1896, as a Swedish patent. J. O. Lundberg, the inventor of the O-ring, received the patent. [6] The US patent [7] [8] for the O-ring was filed in 1937 by a then 72-year-old Danish-born machinist, Niels Christensen. [9]
BDORT as illustrated in patent 5188107 [1]. The Bi-Digital O-Ring Test (BDORT), characterized as a form of applied kinesiology, [2] is a patented alternative medicine diagnostic procedure in which a patient forms an 'O' with his or her fingers, and the diagnostician subjectively evaluates the patient's health according to the patient's finger strength as the diagnostician tries to pry them apart.
A negative aspect of the patent law also emerged in this period – the abuse of patent privilege to monopolise the market and prevent improvement from other inventors. A notable example of this was the behaviour of Boulton & Watt in hounding their competitors such as Richard Trevithick through the courts, and preventing their improvements to ...
O-ring, a gasket or seal with an O-shaped cross-section; O-ring chain, a specialized type of roller chain; Oring language, in Nigeria; Orienteering. Fox Oring; OR-ing as an operation of logical disjunction, in logic, electronics, or computer science; Ring of O, the BDSM jewelry; O-Ring theory of economic development; O-Ring failure as a cause ...
The seal ring and mating ring are in intimate contact, one ring rotates with the shaft and the other ring is stationary. Either ring may be rotating or stationary. Also, either ring may be made of hard or soft material. These two rings are machined using a process called lapping in order to obtain the necessary degree of surface finish and ...
LLP, Ladas & Parry. "A Brief History of the Patent Law of the United States". New York, 1999. Web Page. . Muir, Ian, Matthias Brandi-Dohrn, and Stephan Gruber. European Patent Law : Law and Procedure under the Epc and Pct. Oxford; New York: Oxford University Press, 1999. Robert B. Matchette et al. "Records of the Patent and Trademark Office".
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A complete sheathing would have no lip, but required the Horner's skill to devise a means of manufacturing the deep metal cone. Unusually, although Halifax and Yorkshire East of the Pennines is best known for its wool trade, the patent mentions cotton yarns specifically, generally considered a Lancashire trade, West of the Pennines.