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In the law of Patents, the presence of two pending applications, or an existing patent and a pending application that encompass an identical invention or discovery.

When interference exists, the Patent and Trademark Office conducts an investigation to ascertain the priority of invention between the conflicting applications, or the application and the patent. A patent is customarily granted to the earlier invention.

West's Encyclopedia of American Law, edition 2. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in classic literature ?
Let her understand clearly what the result of his interference would be.
Having no excuse for open interference, he made an effort to part them.
Let me only persuade him that his interference at this moment will save him inevitable trouble and wretchedness and responsibility hereafter, and he will bestir himself for his own sake.
Would it be possible to place Sir Percival between the two alternatives of either exposing himself to the scandal of legal interference on his wife's behalf, or of allowing her to be quietly separated from him for a time under pretext of a visit to her uncle's house?
Secondly, to avoid the degradation of interference suppression performance when the number of interferences falling into a TF point exceeds the limitation that an antenna array can cope with, we propose a space-time-frequency minimum output power- (STF-MOP) based interference suppression method to modify the conventional weight calculation formula by using a reference TF point.
All laboratory testing is susceptible to interferences. This is not new.
Most critical issue in the deployment of femto cell in the macro cell are potential interferences, to reduce the interference in the wireless communication system some of the major techniques are interference coordination, interference cancellation, coordinated multipoint transmission and reception and interference alignment.
Paraproteins are a common cause of interferences with automated chemistry methods.
Patent and Trademark Office (USPTO) against Geron in its patent interferences.
However, there exist various kinds of interferences, such as radio-frequency interference (RFI) and artificial interference [2,3].

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