Assignee
US PRECISION LENS INC
US·40 granted patents·3,168 citations·filing 1977–1999
Top patents by PatentIndex Score
40 records- 0198US5625495ATelecentric lens systems for forming an image of an object composed of pixelsUS PRECISION LENS INC·Filed 1994·Granted Apr 29, 1997·242 cites·18 claims
- 0297US5200861ALens systemsUS PRECISION LENS INC·Filed 1991·Granted Apr 6, 1993·200 cites·47 claims
- 0395US5870228AProjection lenses having larger back focal length to focal length ratiosUS PRECISION LENS INC·Filed 1997·Granted Feb 9, 1999·128 cites·4 claims
- 0495US5218480ARetrofocus wide angle lensUS PRECISION LENS INC·Filed 1991·Granted Jun 8, 1993·152 cites·15 claims
- 0594US5969876AProjection lenses having large back focal length to focal length ratiosUS PRECISION LENS INC·Filed 1999·Granted Oct 19, 1999·116 cites·22 claims
- 0694US5900987AZoom projection lenses for use with pixelized panelsUS PRECISION LENS INC·Filed 1998·Granted May 4, 1999·145 cites·9 claims
- 0794US5329363AProjection lens systems having reduced spherochromatismUS PRECISION LENS INC·Filed 1993·Granted Jul 12, 1994·128 cites·35 claims
- 0894US5313330AZoom projection lens systemsUS PRECISION LENS INC·Filed 1992·Granted May 17, 1994·134 cites·36 claims
- 0993USRE35310EColor corrected projection lensUS PRECISION LENS INC·Filed 1992·Granted Aug 6, 1996·98 cites·42 claims
- 1093US5296967AHigh speed wide angle projection TV lens systemUS PRECISION LENS INC·Filed 1992·Granted Mar 22, 1994·111 cites·14 claims
- 1192US6097551ALenses for electronic imaging systemsUS PRECISION LENS INC·Filed 1997·Granted Aug 1, 2000·104 cites·33 claims
- 1292US5900989AMini-zoom projection lenses for use with pixelized panelsUS PRECISION LENS INC·Filed 1997·Granted May 4, 1999·99 cites·16 claims
- 1392US5841587ALCD projection lensUS PRECISION LENS INC·Filed 1996·Granted Nov 24, 1998·107 cites·17 claims
- 1491US6023375AProjection lenses for use with large pixelized panelsUS PRECISION LENS INC·Filed 1997·Granted Feb 8, 2000·92 cites·21 claims
- 1591US5969874ALong focal length projection lensesUS PRECISION LENS INC·Filed 1997·Granted Oct 19, 1999·105 cites·18 claims
- 1691US5963375AAthermal LCD projection lensUS PRECISION LENS INC·Filed 1997·Granted Oct 5, 1999·101 cites·16 claims
- 1791US5677797AMethod for correcting field curvatureUS PRECISION LENS INC·Filed 1994·Granted Oct 14, 1997·94 cites·6 claims
- 1891US5309283AHybrid, color-corrected, projection TV lens systemUS PRECISION LENS INC·Filed 1993·Granted May 3, 1994·110 cites·28 claims
- 1991US4963007AColor corrected projection lensUS PRECISION LENS INC·Filed 1989·Granted Oct 16, 1990·67 cites·40 claims
- 2091US4300817AProjection lensUS PRECISION LENS INC·Filed 1979·Granted Nov 17, 1981·59 cites·37 claims
- 2190US6094311ALCD projection lensUS PRECISION LENS INC·Filed 1997·Granted Jul 25, 2000·95 cites·16 claims
- 2288US5936776AFocusable front projection lens systems for use with large screen formatsUS PRECISION LENS INC·Filed 1997·Granted Aug 10, 1999·92 cites·41 claims
- 2388US5808804AProjection television lens systemUS PRECISION LENS INC·Filed 1996·Granted Sep 15, 1998·113 cites·19 claims
- 2488US4682862AProjection lensUS PRECISION LENS INC·Filed 1986·Granted Jul 28, 1987·60 cites·42 claims
- 2588US4348081AProjection lensUS PRECISION LENS INC·Filed 1981·Granted Sep 7, 1982·50 cites·22 claims
- 2687US4776681AProjection lensUS PRECISION LENS INC·Filed 1986·Granted Oct 11, 1988·61 cites·88 claims
- 2786US4526442ACompact projection lensUS PRECISION LENS INC·Filed 1981·Granted Jul 2, 1985·45 cites·27 claims
- 2873US4900139AColor corrected projection lensUS PRECISION LENS INC·Filed 1988·Granted Feb 13, 1990·31 cites·59 claims
- 2972US5055922AColor tv projection lens systemUS PRECISION LENS INC·Filed 1990·Granted Oct 8, 1991·37 cites·13 claims
- 3069US4697892AProjection lensUS PRECISION LENS INC·Filed 1984·Granted Oct 6, 1987·22 cites·57 claims
- 3169US4685774AProjection lensUS PRECISION LENS INC·Filed 1986·Granted Aug 11, 1987·27 cites·60 claims
- 3263US6115082ACoupler systems for projection televisionsUS PRECISION LENS INC·Filed 1997·Granted Sep 5, 2000·17 cites·10 claims
- 3362US4755028AProjection lens with an aspherical corrector lens elementUS PRECISION LENS INC·Filed 1986·Granted Jul 5, 1988·21 cites·27 claims
- 3458US6025959AColor corrected projection lenses for use with curved faceplate cathode ray tubesUS PRECISION LENS INC·Filed 1998·Granted Feb 15, 2000·21 cites·7 claims
- 3558US4815831AProjection lens with color correctionUS PRECISION LENS INC·Filed 1985·Granted Mar 28, 1989·18 cites·46 claims
- 3658US4801196AWide angle projection lensUS PRECISION LENS INC·Filed 1985·Granted Jan 31, 1989·18 cites·67 claims
- 3754US6104554AProjection television lens assemblyUS PRECISION LENS INC·Filed 1999·Granted Aug 15, 2000·22 cites·16 claims
- 3852US4707084AProjection lensUS PRECISION LENS INC·Filed 1984·Granted Nov 17, 1987·11 cites·43 claims
- 3942US5991089ALong focal length projection lenses for use with large pixelized panelsUS PRECISION LENS INC·Filed 1998·Granted Nov 23, 1999·9 cites·16 claims
- 4041US4163604AProjection lensUS PRECISION LENS INC·Filed 1977·Granted Aug 7, 1979·6 cites·10 claims
Join the waitlist — get patent alerts
Get an alert when US PRECISION LENS INC files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →