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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 ?
With the help of control block and video camera the ratio between intensities of object and support beams can be changed seeking for the best brightness of interference fringes.
Several related methods are available that divide a beam of light into two beams, insert a variable delay in one of them, and recombine the beams to create a series of interference fringes.
An etalon of the material is illuminated with synchrotron radiation, and the interference fringes in the transmittance spectrum are measured using a Fourier transform spectrometer.
These include calculated interference fringes, along with stereoscopic effects and colouring, and can be created in a tenth of the time it took previously.
Caption: Testing the convex surfaces was done by looking at interference fringes with a matching concave surface of known quality.
Balanced detector output signal show the interference fringes signal.
Spectral averaging over the wavelength region is not acceptable since the interference fringes from thin layers should not be averaged.
Tokyo, Feb 15, 2013 - (JCN) - Through joint research with Professor Yasuhiro Koike of Keio University, Toyobo has developed COSMOSHINE, a polyester-based super retarder film (SRF) that uses the features of LED light sources to eliminate interference fringes (rainbow mura).
The angle between the beams creates interference fringes at the CCD camera.
Photoelastic analysis is a visual measurement based on the property of some transparent materials to exhibit interference fringes when stressed in a polarized light field.
This represents a significant improvement over conventional TIRF as it removes interference fringes and allows fast multi-angle illumination to correct for chromatic differences and 3D illumination of the cell cortex, as well as a modality for fast photoactivation or FRAP.

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