Inventor · disambiguated record
Donald A. Volk
Also filed as: VOLK DONALD A
34 granted patents·3 pending applications·1,378 citations·filing 1988–2010
98Inventor score
Top patents by PatentIndex Score
37 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
- 0479US5440458AIlluminated lens caseFiled 1993·Granted Aug 8, 1995·39 cites·17 claims
- 0575US5706073AIndirect ophthalmoscopy lens for use with split lamp or other biomicroscopeFiled 1995·Granted Jan 6, 1998·35 cites·29 claims
- 0670US5347326ADiagnostic or therapeutic contact lensVOLK DONALD A·Filed 1992·Granted Sep 13, 1994·138 cites·20 claims
- 0767US5745212AIndirect ophthalmoscopy device with reinverting lens system with the real inverted image or conjugate pupil formed at least partially within a lens of the reinverting lens systemVOLK OPTICAL INC·Filed 1996·Granted Apr 28, 1998·18 cites·17 claims
- 0865US5857475AOptical component cleaning apparatusVOLK OPTICAL INC·Filed 1997·Granted Jan 12, 1999·28 cites·27 claims
- 0965US4934809ALens positioning device for indirect biomicroscopy of the eyeVOLK DONALD A·Filed 1988·Granted Jun 19, 1990·73 cites·11 claims
- 1063US5805269AHigh magnification indirect ophthalmoscopy lens deviceVOLK OPTICAL INC·Filed 1996·Granted Sep 8, 1998·26 cites·22 claims
- 1161US5046836ADiagnostic indirect ophthmalmoscopy contact lens systemVOLK DONALD A·Filed 1989·Granted Sep 10, 1991·59 cites·20 claims
- 1259USD357319SIndirect ophthalmoscopy lens retaining ringVOLK DONALD A·Filed 1993·Granted Apr 11, 1995·9 cites·1 claims
- 1358US5200773ADiagnostic indirect ophthalmoscopy contact lens systemVOLK DONALD A·Filed 1990·Granted Apr 6, 1993·81 cites·20 claims
- 1457USD434498SIndirect ophthalmoscopy lens two piece retaining ringVOLK OPTICAL INC·Filed 1999·Granted Nov 28, 2000·9 cites·1 claims
- 1556US5479222AIndirect ophthalmoscopy lens system and adapter lensesFiled 1993·Granted Dec 26, 1995·60 cites·19 claims
- 1655US5255025AMeasurement apparatus for indirect ophthalmoscopyVOLK DONALD A·Filed 1991·Granted Oct 19, 1993·66 cites·15 claims
- 1754US5986801AImage reinverter for stereo microscopeFiled 1997·Granted Nov 16, 1999·25 cites·33 claims
- 1853US5784147AIndirect ophthalmoscopy lens systemFiled 1995·Granted Jul 21, 1998·60 cites·31 claims
- 1953US5523810AIndirect ophthalmoscopy contact lens device with compound contact lens elementVOLK DONALD A·Filed 1995·Granted Jun 4, 1996·66 cites·37 claims
- 2052US7789512B2Real image forming eye examination lens utilizing two reflecting surfacesVOLK DONALD A·Filed 2008·Granted Sep 7, 2010·0 cites·121 claims
- 2152US5216456AOptical device for use with a slit lamp biomicroscopeVOLK DONALD A·Filed 1990·Granted Jun 1, 1993·50 cites·16 claims
- 2252US2010091244A1Real image forming eye examination lens utilizing two reflecting surfaces with non-mirrored central viewing areaVOLK DONALD A·Filed 2009·Application pending·0 cites
- 2351US5333017AIndirect ophthalmoscopy lens for use with slit lamp biomicroscopeVOLK DONALD A·Filed 1992·Granted Jul 26, 1994·15 cites·19 claims
- 2449US5424789AOptical device for use with a slit lamp biomicroscopeFiled 1993·Granted Jun 13, 1995·41 cites·16 claims
- 2548US6164779AOphthalmoscopic viewing systemVOLK OPTICAL INC·Filed 1997·Granted Dec 26, 2000·42 cites·39 claims
- 2647USD434851SIndirect ophthalmoscopy lens straight retaining ringVOLK OPTICAL INC·Filed 1999·Granted Dec 5, 2000·6 cites·1 claims
- 2746US2009185135A1Real image forming eye examination lens utilizing two reflecting surfaces providing upright imageVOLK DONALD A·Filed 2009·Application pending·0 cites
- 2844US5526074AFull field reinverting indirect contact ophthalmoscopeFiled 1994·Granted Jun 11, 1996·31 cites·17 claims
- 2944US5430506AIndirect ophthalmoscopy lens for use with slit lamp biomicroscopeFiled 1993·Granted Jul 4, 1995·27 cites·34 claims
- 3041USD438621SIndirect ophthalmoscopy lens retaining ringVOLK OPTICAL INC·Filed 1998·Granted Mar 6, 2001·4 cites·1 claims
- 3140US5886812AMicroscope attachmentVOLK OPTICAL INC·Filed 1997·Granted Mar 23, 1999·23 cites·17 claims
- 3240US2010238400A1Multi-layered gradient index progressive lensVOLK DONALD A·Filed 2010·Application pending·0 cites
- 3339US4913545AAdapter for lens retaining ring for use in connection with eye examinationVOLK DONALD A·Filed 1988·Granted Apr 3, 1990·16 cites·14 claims
- 3437US5963301ALense arrangement for vitreoretinal surgeryVOLK OPTICAL INC·Filed 1998·Granted Oct 5, 1999·36 cites·24 claims
- 3536US5757464AIndirect ophthalmoscopy contact lens device with compound contact lens elementVOLK OPTICAL INC·Filed 1996·Granted May 26, 1998·18 cites·18 claims
- 3634US5436680AIndirect ophthalmoscopy lens providing apparent image curvatureFiled 1994·Granted Jul 25, 1995·14 cites·21 claims
- 3732USRE37298EIndirect ophthalmoscopy lens retaining ringVOLK OPTICAL INC·Filed 1995·Granted Jul 31, 2001·8 cites·0 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →