Assignee
HUMPHREY INSTRUMENTS INC
34 granted patents·863 citations·filing 1974–1993
Top patents by PatentIndex Score
34 records- 0186US4070115ALens meterHUMPHREY INSTRUMENTS INC·Filed 1976·Granted Jan 24, 1978·35 cites·36 claims
- 0283US4098002AApparatus for locating inter-pupilary of nose bridge mounted spectacles to lens meterHUMPHREY INSTRUMENTS INC·Filed 1977·Granted Jul 4, 1978·30 cites·13 claims
- 0381US4180325ALens meter with automated readoutHUMPHREY INSTRUMENTS INC·Filed 1977·Granted Dec 25, 1979·29 cites·38 claims
- 0481US4043644AElastically compensated off-axis mirrorHUMPHREY INSTRUMENTS INC·Filed 1976·Granted Aug 23, 1977·36 cites·13 claims
- 0580US4730910AWide angle lens system having flare rejection propertiesHUMPHREY INSTRUMENTS INC·Filed 1985·Granted Mar 15, 1988·41 cites·16 claims
- 0674US4415239AReflection rejection spherical optical train composed of tipped lens elementsHUMPHREY INSTRUMENTS INC·Filed 1980·Granted Nov 15, 1983·27 cites·8 claims
- 0768US4420228AMethod and apparatus for analysis of corneal shapeHUMPHREY INSTRUMENTS INC·Filed 1980·Granted Dec 13, 1983·65 cites·5 claims
- 0867US4182572ALensmeter utilizing non-parallel lightHUMPHREY INSTRUMENTS INC·Filed 1977·Granted Jan 8, 1980·17 cites·20 claims
- 0967US4130361ALens meter without relatively moving optical partsHUMPHREY INSTRUMENTS INC·Filed 1977·Granted Dec 19, 1978·17 cites·23 claims
- 1062US4199816AOptical calibration apparatus and procedureHUMPHREY INSTRUMENTS INC·Filed 1978·Granted Apr 22, 1980·38 cites·19 claims
- 1161US5339151ASpectrometer for lensometerHUMPHREY INSTRUMENTS INC·Filed 1992·Granted Aug 16, 1994·25 cites·15 claims
- 1259US4732466AFundus cameraHUMPHREY INSTRUMENTS INC·Filed 1985·Granted Mar 22, 1988·58 cites·16 claims
- 1359US4540254AKeratometer having peripheral light entrance and exit pathsHUMPHREY INSTRUMENTS INC·Filed 1982·Granted Sep 10, 1985·43 cites·4 claims
- 1458US4695831ALight pen having actuating accelerometerHUMPHREY INSTRUMENTS INC·Filed 1985·Granted Sep 22, 1987·26 cites·3 claims
- 1555US4640596AObjective refractor for the eyeHUMPHREY INSTRUMENTS INC·Filed 1982·Granted Feb 3, 1987·35 cites·8 claims
- 1654US4650301AObjective refractor for the eyeHUMPHREY INSTRUMENTS INC·Filed 1984·Granted Mar 17, 1987·34 cites·3 claims
- 1754US3964818ARemote stereo microscope with field mirror reflected ocular pathsHUMPHREY INSTRUMENTS INC·Filed 1975·Granted Jun 22, 1976·13 cites·15 claims
- 1853US5412854AMethod of making a high frequency focused transducerHUMPHREY INSTRUMENTS INC·Filed 1993·Granted May 9, 1995·18 cites·14 claims
- 1953US4669835AObjective refractor for the eyeHUMPHREY INSTRUMENTS INC·Filed 1984·Granted Jun 2, 1987·31 cites·4 claims
- 2051US5303022ALensometer with guided lens movement for progressive addition lensHUMPHREY INSTRUMENTS INC·Filed 1992·Granted Apr 12, 1994·16 cites·3 claims
- 2150US3947097AProcess and apparatus for astigmatic and spherical subjective testing of the eyeHUMPHREY INSTRUMENTS INC·Filed 1974·Granted Mar 30, 1976·23 cites·23 claims
- 2247US4675736ASuperimposed analog video image on plotted digital field tester displayHUMPHREY INSTRUMENTS INC·Filed 1985·Granted Jun 23, 1987·31 cites·16 claims
- 2347US4015899AEye test apparatus with physician routed patient input adjustment to variable optical elementsHUMPHREY INSTRUMENTS INC·Filed 1975·Granted Apr 5, 1977·18 cites·12 claims
- 2446US4113363AProcess and apparatus for astigmatic and spherical subjective testing of the eyeHUMPHREY INSTRUMENTS INC·Filed 1977·Granted Sep 12, 1978·17 cites·15 claims
- 2544US4407572AKeratometerHUMPHREY INSTRUMENTS INC·Filed 1980·Granted Oct 4, 1983·20 cites·23 claims
- 2642US4739410ASuperimposed analog video image on plotted digital field tester displayHUMPHREY INSTRUMENTS INC·Filed 1986·Granted Apr 19, 1988·7 cites·4 claims
- 2741US4561738AField testerHUMPHREY INSTRUMENTS INC·Filed 1982·Granted Dec 31, 1985·17 cites·17 claims
- 2839US5491757AField tester gaze tracking using content addressable memories to improve image data analysis speedHUMPHREY INSTRUMENTS INC·Filed 1993·Granted Feb 13, 1996·28 cites·13 claims
- 2937US5323194APerimeter with non spherical bowlHUMPHREY INSTRUMENTS INC·Filed 1992·Granted Jun 21, 1994·23 cites·24 claims
- 3036US5461436AColor field test with occlusion of non-tested eyeHUMPHREY INSTRUMENTS INC·Filed 1993·Granted Oct 24, 1995·17 cites·4 claims
- 3135US4607922AMethod for aligning an eye examination instrument with the eye under examinationHUMPHREY INSTRUMENTS INC·Filed 1984·Granted Aug 26, 1986·10 cites·1 claims
- 3234US4707090AObjective refractor for the eyeHUMPHREY INSTRUMENTS INC·Filed 1984·Granted Nov 17, 1987·9 cites·3 claims
- 3333US4560259AObjective refractor for the eyeHUMPHREY INSTRUMENTS INC·Filed 1984·Granted Dec 24, 1985·7 cites·40 claims
- 3430US4189215AMethod and apparatus for the corneal positioning of a patient's eyeHUMPHREY INSTRUMENTS INC·Filed 1976·Granted Feb 19, 1980·2 cites·31 claims
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