Inventor
Donald A. Volk
Inventor
Mentor, OH, US
Overview
Patents· 34 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
A61Bprimary
A61BDiagnosis49%
G02BOptical elements, systems or apparatus14%
G02CSpectacles8%
A61FFilters implantable into blood vessels6%
LOC246%
A45CPurses2%
B08BCleaning in general2%
B29DProducing particular articles from plastics or from substances in a plastic state2%
C03BManufacture, shaping, or supplementary processes2%
F21SNon-portable lighting devices2%
PatentTitleYear
7,789,512'Real image forming eye examination lens utilizing two reflecting surfaces'20107,740,354'Multi-layered gradient index progressive lens'20107,735,998'Multi-layered multifocal lens with blended refractive index'2010RE037298'Indirect ophthalmoscopy lens retaining ring'2001D0438621'Indirect ophthalmoscopy lens retaining ring'20016,164,779'Ophthalmoscopic viewing system'2000D0434851'Indirect ophthalmoscopy lens straight retaining ring'2000D0434498'Indirect ophthalmoscopy lens two piece retaining ring'20005,986,801'Image reinverter for stereo microscope'19995,963,301'Lense arrangement for vitreoretinal surgery'19995,886,812'Microscope attachment'19995,857,475'Optical component cleaning apparatus'19995,805,269'High magnification indirect ophthalmoscopy lens device'19985,784,147'Indirect ophthalmoscopy lens system'19985,757,464'Indirect ophthalmoscopy contact lens device with compound contact lens element'19985,745,212'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'19985,706,073'Indirect ophthalmoscopy lens for use with split lamp or other biomicroscope'19985,526,074'Full field reinverting indirect contact ophthalmoscope'19965,523,810'Indirect ophthalmoscopy contact lens device with compound contact lens element'19965,479,222'Indirect ophthalmoscopy lens system and adapter lenses'19955,440,458'Illuminated lens case'19955,436,680'Indirect ophthalmoscopy lens providing apparent image curvature'19955,430,506'Indirect ophthalmoscopy lens for use with slit lamp biomicroscope'19955,424,789'Optical device for use with a slit lamp biomicroscope'1995D0357319'Indirect ophthalmoscopy lens retaining ring'19955,347,326'Diagnostic or therapeutic contact lens'19945,333,017'Indirect ophthalmoscopy lens for use with slit lamp biomicroscope'19945,255,025'Measurement apparatus for indirect ophthalmoscopy'19935,216,456'Optical device for use with a slit lamp biomicroscope'19935,200,773'Diagnostic indirect ophthalmoscopy contact lens system'19935,173,723'Aspheric ophthalmic accommodating lens design for intraocular lens and contact lens'19925,046,836'Diagnostic indirect ophthmalmoscopy contact lens system'19914,934,809'Lens positioning device for indirect biomicroscopy of the eye'19904,913,545'Adapter for lens retaining ring for use in connection with eye examination'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–2010Patents assigned to VOLK DONALD A (14)· patent assignee history
1990Based in Mayfield Heights, OH, US· patent location history
1991–2001Based in Mentor, OH, US· patent location history
1998–2001Patents assigned to VOLK OPTICAL INC (11)· patent assignee history
2010Based in Honolulu, HI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| VOLK DONALD Aself | 14 | 1990–2010 |
| VOLK OPTICAL INC | 11 | 1998–2001 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mentor, OH, US | 29 | 1991–2001 |
| Honolulu, HI, US | 3 | 2010 |
| Mayfield Heights, OH, US | 2 | 1990 |