Inventor
VOLK DONALD A
34 patents
⚠️ This page may combine multiple inventors who share the name “VOLK DONALD A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VOLK DONALD A
14 patentsUS5173723ADec 22, 1992
Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens
VOLK DONALD A225 citations99
US5347326ASep 13, 1994
Diagnostic or therapeutic contact lens
VOLK DONALD A138 citations98
US5523810AJun 4, 1996
Indirect ophthalmoscopy contact lens device with compound contact lens element
VOLK DONALD A66 citations96
US5255025AOct 19, 1993
Measurement apparatus for indirect ophthalmoscopy
VOLK DONALD A66 citations96
US5216456AJun 1, 1993
Optical device for use with a slit lamp biomicroscope
VOLK DONALD A50 citations96
US5200773AApr 6, 1993
Diagnostic indirect ophthalmoscopy contact lens system
VOLK DONALD A81 citations96
US5046836ASep 10, 1991
Diagnostic indirect ophthmalmoscopy contact lens system
VOLK DONALD A59 citations96
US4934809AJun 19, 1990
Lens positioning device for indirect biomicroscopy of the eye
VOLK DONALD A73 citations96
US7740354B2Jun 22, 2010
Multi-layered gradient index progressive lens
VOLK DONALD A15 citations84
US7735998B2Jun 15, 2010
Multi-layered multifocal lens with blended refractive index
VOLK DONALD A15 citations84
USD357319SApr 11, 1995
Indirect ophthalmoscopy lens retaining ring
VOLK DONALD A9 citations74
US5333017AJul 26, 1994
Indirect ophthalmoscopy lens for use with slit lamp biomicroscope
VOLK DONALD A15 citations74
US4913545AApr 3, 1990
Adapter for lens retaining ring for use in connection with eye examination
VOLK DONALD A16 citations74
US7789512B2Sep 7, 2010
Real image forming eye examination lens utilizing two reflecting surfaces
VOLK DONALD A0 citations52
VOLK OPTICAL INC
11 patentsUS6164779ADec 26, 2000
Ophthalmoscopic viewing system
VOLK OPTICAL INC42 citations92
US5886812AMar 23, 1999
Microscope attachment
VOLK OPTICAL INC23 citations92
US5857475AJan 12, 1999
Optical component cleaning apparatus
VOLK OPTICAL INC28 citations92
US5805269ASep 8, 1998
High magnification indirect ophthalmoscopy lens device
VOLK OPTICAL INC26 citations92
US5963301AOct 5, 1999
Lense arrangement for vitreoretinal surgery
VOLK OPTICAL INC36 citations86
US5757464AMay 26, 1998
Indirect ophthalmoscopy contact lens device with compound contact lens element
VOLK OPTICAL INC18 citations84
US5745212AApr 28, 1998
Indirect 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 system
VOLK OPTICAL INC18 citations84
USRE37298EJul 31, 2001
Indirect ophthalmoscopy lens retaining ring
VOLK OPTICAL INC8 citations74
USD434851SDec 5, 2000
Indirect ophthalmoscopy lens straight retaining ring
VOLK OPTICAL INC6 citations72
USD434498SNov 28, 2000
Indirect ophthalmoscopy lens two piece retaining ring
VOLK OPTICAL INC9 citations72
USD438621SMar 6, 2001
Indirect ophthalmoscopy lens retaining ring
VOLK OPTICAL INC4 citations61
(unassigned)
9 patentsUS5784147AJul 21, 1998
Indirect ophthalmoscopy lens system
60 citations96
US5479222ADec 26, 1995
Indirect ophthalmoscopy lens system and adapter lenses
60 citations96
US5706073AJan 6, 1998
Indirect ophthalmoscopy lens for use with split lamp or other biomicroscope
35 citations92
US5526074AJun 11, 1996
Full field reinverting indirect contact ophthalmoscope
31 citations92
US5440458AAug 8, 1995
Illuminated lens case
39 citations92
US5430506AJul 4, 1995
Indirect ophthalmoscopy lens for use with slit lamp biomicroscope
27 citations92
US5424789AJun 13, 1995
Optical device for use with a slit lamp biomicroscope
41 citations92
US5986801ANov 16, 1999
Image reinverter for stereo microscope
25 citations84
US5436680AJul 25, 1995
Indirect ophthalmoscopy lens providing apparent image curvature
14 citations74