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・ Doctrine of colourability
・ Doctrine of concurrent delay
・ Doctrine of Election
・ Doctrine of equivalents
・ Doctrine of Exchange
・ Doctrine of exoneration of liens
・ Doctrine of Father Divine
・ Doctrine of foreign equivalents
・ Doctrine of indivisibility
・ Doctrine of inherency
・ Doctrine of internal relations
・ Doctrine of Labyrinths
・ Doctrine of lapse
・ Doctrine of marshalling
・ Doctrine of necessity
Doctrine of non-derogation from grants
・ Doctrine of parity
・ Doctrine of repair and reconstruction
・ Doctrine of separation
・ Doctrine of signatures
・ Doctrine of the affections
・ Doctrine of the Mean
・ Doctrine of the Trinity Act 1813
・ Doctrine of worthier title
・ Doctrines of civil procedure
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Doctrine of non-derogation from grants : ウィキペディア英語版
Doctrine of non-derogation from grants
The doctrine of non-derogation from grants is a principle of the law of England and Wales. As the House of Lords explained in ''British Leyland Motor Corp. v. Armstrong Patents Co.'', it states that a seller of realty or goods is not permitted to take any action (such as bringing an infringement action) that will lessen the value to the buyer of the thing sold.
United States federal law recognises similar doctrines such as the exhaustion doctrine or doctrine of implied license.〔A recent decision of the United States Court of Appeals for the Federal Circuit, ''Transcore, LP v. Electronic Transaction Consultants Corp.'' (F.3d), April 8, 2009, not yet officially reported, conflates these doctrines in the following terms: "TransCore sought to enforce the ’946 patent in derogation of the rights it granted under the TransCore–Mark IV settlement agreement. That attempted derogation is prevented by legal estoppel, which gives rise to the implied license." ''Id''. at -- n.4.〕 A similar effect has also been realised in United States patent law under the doctrine of repair and reconstruction.〔See ''Aro Mfg. Co. v. Convertible Top Replacement Co.'', 365 U.S. 336 (1961).〕
An important difference between the doctrine of non-derogation from grants and other doctrines, particularly implied license, that are used to accomplish similar results is that the doctrine of non-derogation from grants is "inherent" as a matter of property law and apparently cannot be avoided by a seller's use of language attempting to negative application of the doctrine or by trial counsel's pointing to evidence of intent not to relinquish patent rights or copyright. In contrast, the other doctrines may be vulnerable to contractual disclaimers or evidence of intent not to grant intellectual property rights. The issue is discussed to some extent in the courts' opinions in ''British Leyland'' and ''Quanta Computer, Inc. v. LG Electronics, Inc.''
== References ==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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