Assignee
VOLK DONALD A
14 granted patents·3 pending applications·828 citations·filing 1988–2010
Top patents by PatentIndex Score
17 records- 0197US5173723AAspheric ophthalmic accommodating lens design for intraocular lens and contact lensVOLK DONALD A·Filed 1990·Granted Dec 22, 1992·225 cites·22 claims
- 0280US7740354B2Multi-layered gradient index progressive lensVOLK DONALD A·Filed 2007·Granted Jun 22, 2010·15 cites·25 claims
- 0380US7735998B2Multi-layered multifocal lens with blended refractive indexVOLK DONALD A·Filed 2007·Granted Jun 15, 2010·15 cites·13 claims
- 0470US5347326ADiagnostic or therapeutic contact lensVOLK DONALD A·Filed 1992·Granted Sep 13, 1994·138 cites·20 claims
- 0565US4934809ALens positioning device for indirect biomicroscopy of the eyeVOLK DONALD A·Filed 1988·Granted Jun 19, 1990·73 cites·11 claims
- 0661US5046836ADiagnostic indirect ophthmalmoscopy contact lens systemVOLK DONALD A·Filed 1989·Granted Sep 10, 1991·59 cites·20 claims
- 0759USD357319SIndirect ophthalmoscopy lens retaining ringVOLK DONALD A·Filed 1993·Granted Apr 11, 1995·9 cites·1 claims
- 0858US5200773ADiagnostic indirect ophthalmoscopy contact lens systemVOLK DONALD A·Filed 1990·Granted Apr 6, 1993·81 cites·20 claims
- 0955US5255025AMeasurement apparatus for indirect ophthalmoscopyVOLK DONALD A·Filed 1991·Granted Oct 19, 1993·66 cites·15 claims
- 1053US5523810AIndirect ophthalmoscopy contact lens device with compound contact lens elementVOLK DONALD A·Filed 1995·Granted Jun 4, 1996·66 cites·37 claims
- 1152US7789512B2Real image forming eye examination lens utilizing two reflecting surfacesVOLK DONALD A·Filed 2008·Granted Sep 7, 2010·0 cites·121 claims
- 1252US5216456AOptical device for use with a slit lamp biomicroscopeVOLK DONALD A·Filed 1990·Granted Jun 1, 1993·50 cites·16 claims
- 1352US2010091244A1Real image forming eye examination lens utilizing two reflecting surfaces with non-mirrored central viewing areaVOLK DONALD A·Filed 2009·Application pending·0 cites
- 1451US5333017AIndirect ophthalmoscopy lens for use with slit lamp biomicroscopeVOLK DONALD A·Filed 1992·Granted Jul 26, 1994·15 cites·19 claims
- 1546US2009185135A1Real image forming eye examination lens utilizing two reflecting surfaces providing upright imageVOLK DONALD A·Filed 2009·Application pending·0 cites
- 1640US2010238400A1Multi-layered gradient index progressive lensVOLK DONALD A·Filed 2010·Application pending·0 cites
- 1739US4913545AAdapter for lens retaining ring for use in connection with eye examinationVOLK DONALD A·Filed 1988·Granted Apr 3, 1990·16 cites·14 claims
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