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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 ...
Thus the seal is created. O-rings decidedly do not act in any way like this. They use the pressure of the fluid to slightly push themselves into the crevice on the other side of the groove. In short, a gasket simply improves the seal between two surfaces while an O-ring is a seal in itself.128.6.73.200 16:35, 31 July 2009 (UTC)
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".
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.
Diana’s Ring Was Sold in a Catalog. In fact, it was featured in the catalog for royal jeweler Garrard back in 1981, meaning it’s possible (probably inevitable) that multiple people have the ...
The O-ring theory of economic development is a model of economic development put forward by Michael Kremer in 1993, [1] which proposes that tasks of production must be executed proficiently together in order for any of them to be of high value. The key feature of this model is positive assortative matching, whereby people with similar skill ...