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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.


noun antagonism, antipathy, bar, barrier, censure, check, collision, conflict, contravention, damper, disapproval, disturbance, encumbrance, fetter, frustration, hindrance, impediment, imposition, interception, intercession, intermediacy, interruption, intervention, intrusion, invasion, meddling, nuisance, obstruction, onus, opposition, resistance, restraint, setback, stricture, stumbling block
Associated concepts: contempt, frustration of contract, interrerence with contractual relations
See also: bar, barrier, burden, check, collision, conflict, damper, deterrence, deterrent, disadvantage, dispute, embargo, encroachment, encumbrance, fetter, filibuster, frustration, handicap, hiatus, hindrance, impediment, imposition, infringement, intercession, interruption, intervention, intrusion, invasion, mediation, molestation, nuisance, obstruction, onus, opposition, prohibition, resistance, restraint, veto
References in periodicals archive ?
Just 56 seconds into the game referee Hanson decided the Panthers' player-coach Corey Neilson was guilty of interferance but the Vipers couldn't capitalise on their man advantage and the Panthers were soon to give them a powerplay lesson.
The system comprises CAT Corporations's Monics carrier monitoring and interferance detaction system and a transponder management system from Optimal Satcom.
Mr Clarke reckons 'interferance in their private life is justified and proportionate in the pursuit of effective immigration control' adding he found 'no compelling reason' for allowing Mr Dar and his family to stay.