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COHEN ALLEN L

Overview
  • Total Patents
    81
About

COHEN ALLEN L has a total of 81 patent applications. Its first patent ever was published in 1976. It filed its patents most often in United States, Australia and Canada. Its main competitors in its focus markets optics, medical technology and consumer goods are DANYANG BAIYISHI OPTICAL GLASSES CO LTD, EDLENS BIKEN INK and ULVIO KARI.

Patent filings per year

Chart showing COHEN ALLEN Ls patent filings per year from 1900 to 2020

Focus industries

Top inventors

# Name Total Patents
#1 Cohen Allen L 67
#2 Aren Eru Kooen 6
#3 Allen L Cohen 6
#4 Hydron Ltd 1

Latest patents

Publication Filing date Title
US5144483A Diffractive multifocal optical device
US5120120A Multifocal optical device with spurious order suppression and method for manufacture of same
US5117306A Diffraction bifocal with adjusted chromaticity
US4995714A Multifocal optical device with novel phase zone plate and method for making
US5121979A Diffractive multifocal optical device
US5054905A Progressive intensity phase bifocal
US5056908A Optic zone phase channels
US5121980A Small aperture multifocal
IE68759B1 Multifocals using phase shifting steps
CN1042613A Multifocals using phase shifting steps
AU2501988A Multifocal optical device with novel phase zone plate
JPH0255314A Multi-focus optical device
JPH02137815A Multi-focal point phase plate
ZA8808412B Multifocals using phase shifting steps
IL88345D0 Multifocals using phase shifting steps
KR0133917B1 A multiple focal point profiled phase plate
US4898192A Holographic false nails
US4889421A Contact lens with cosmetic pattern
US4876121A Cosmetic artificial nails
US5009497A Contact lenses utilizing keel orientation