Assignee
COHEN ALLEN L
US·21 granted patents·4,007 citations·filing 1976–1991
Top patents by PatentIndex Score
21 records- 0199US4340283APhase shift multifocal zone plateCOHEN ALLEN L·Filed 1979·Granted Jul 20, 1982·359 cites·9 claims
- 0299US4338005AMultifocal phase placeCOHEN ALLEN L·Filed 1980·Granted Jul 6, 1982·237 cites·12 claims
- 0399US4210391AMultifocal zone plateCOHEN ALLEN L·Filed 1978·Granted Jul 1, 1980·419 cites·15 claims
- 0498US5117306ADiffraction bifocal with adjusted chromaticityCOHEN ALLEN L·Filed 1990·Granted May 26, 1992·307 cites·24 claims
- 0598US5056908AOptic zone phase channelsCOHEN ALLEN L·Filed 1989·Granted Oct 15, 1991·223 cites·12 claims
- 0698US4995715ADiffractive multifocal optical deviceCOHEN ALLEN L·Filed 1989·Granted Feb 26, 1991·293 cites·27 claims
- 0798US4995714AMultifocal optical device with novel phase zone plate and method for makingCOHEN ALLEN L·Filed 1989·Granted Feb 26, 1991·239 cites·17 claims
- 0898US4162122AZonal bifocal contact lensCOHEN ALLEN L·Filed 1977·Granted Jul 24, 1979·199 cites·1 claims
- 0997US5121980ASmall aperture multifocalCOHEN ALLEN L·Filed 1989·Granted Jun 16, 1992·227 cites·34 claims
- 1097US5120120AMultifocal optical device with spurious order suppression and method for manufacture of sameCOHEN ALLEN L·Filed 1990·Granted Jun 9, 1992·290 cites·16 claims
- 1197US5054905AProgressive intensity phase bifocalCOHEN ALLEN L·Filed 1989·Granted Oct 8, 1991·175 cites·26 claims
- 1296US5121979ADiffractive multifocal optical deviceCOHEN ALLEN L·Filed 1989·Granted Jun 16, 1992·170 cites·19 claims
- 1396US4881804AMultifocal phase plate with a pure refractive portionCOHEN ALLEN L·Filed 1987·Granted Nov 21, 1989·172 cites·34 claims
- 1495US5144483ADiffractive multifocal optical deviceCOHEN ALLEN L·Filed 1991·Granted Sep 1, 1992·162 cites·3 claims
- 1594US5017000AMultifocals using phase shiftingCOHEN ALLEN L·Filed 1986·Granted May 21, 1991·129 cites·17 claims
- 1693US4881805AProgressive intensity phase bifocalCOHEN ALLEN L·Filed 1987·Granted Nov 21, 1989·122 cites·17 claims
- 1791US4889421AContact lens with cosmetic patternCOHEN ALLEN L·Filed 1988·Granted Dec 26, 1989·108 cites·16 claims
- 1890US4876121ACosmetic artificial nailsCOHEN ALLEN L·Filed 1988·Granted Oct 24, 1989·58 cites·41 claims
- 1988US5009497AContact lenses utilizing keel orientationCOHEN ALLEN L·Filed 1988·Granted Apr 23, 1991·81 cites·5 claims
- 2078US4898192AHolographic false nailsCOHEN ALLEN L·Filed 1988·Granted Feb 6, 1990·33 cites·7 claims
- 2132US4011010AVisual field tester which is entitled multiscale perimeterCOHEN ALLEN L·Filed 1976·Granted Mar 8, 1977·4 cites·2 claims
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