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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 ?
Surface and relief holographic gratings can be made in the laboratory by exposing polymer thin films and photoconductive materials to interference patterns at an appropriate wavelengths of the two polarized interfering writing beams (Johnson 1978).
Unlike existing mainstream embossed holograms, which record images in physical relief on the surface of the material, the newly developed hologram is a Lippmann hologram, which stores images by recording interference patterns in photo-sensitive layers produced by laser.
The differences in the height of specimen structures are then determined by measuring the phase shift in the interference pattern.
It uses a patented algorithm to find the coherence peak position of an interference pattern produced by a selectable bandwidth light source.
A conclusion, which comes from the contradictions between these experiment results and the existing knowledge in modern anatomy, histology, neurology, and biochemistry, is that there is an invisible dissipative structure the electromagnetic field, which is mainly composed of an interference pattern of standing waves in the resonance cavity of human body under the condition of permanent support of energy in an open system.
The beams are steered at each other, thus creating an interference pattern, explained Bevan.
A hologram is an interference pattern generated from the object being depicted.
A laser beam and a second "interference" beam focused on the array create a holographic interference pattern that is recorded onto a photopolymer on the disc.
Holographic crystals rearrange their electrons in response to these beams, thus creating a necessary interference pattern.
Result: a digital representation of the interference pattern.
The two parts would meet at the photographic film, where the interference pattern would be recorded.
The TopWave thickness gauge, which is said to do a better job of this than infrared-absorption instruments, is based on a white-light interferometer that scans the interference pattern of a light beam reflecting from the material to be measured; layer thickness is then calculated from the separation of the interference pulses, and similarities or differences between material composition of the layers is not a factor.

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