DV

Donald A. Volk

VO Volk Optical: 11 patents #1 of 13Top 8%
📍 Mayfield Heights, OH: #6 of 204 inventorsTop 3%
🗺 Ohio: #1,443 of 73,341 inventorsTop 2%
Overall (All Time): #103,920 of 4,157,543Top 3%
34
Patents All Time

Issued Patents All Time

Showing 1–25 of 34 patents

Patent #TitleCo-InventorsDate
7789512 Real image forming eye examination lens utilizing two reflecting surfaces 2010-09-07
7740354 Multi-layered gradient index progressive lens 2010-06-22
7735998 Multi-layered multifocal lens with blended refractive index 2010-06-15
RE37298 Indirect ophthalmoscopy lens retaining ring 2001-07-31
D438621 Indirect ophthalmoscopy lens retaining ring Richard Mueller 2001-03-06
6164779 Ophthalmoscopic viewing system 2000-12-26
D434851 Indirect ophthalmoscopy lens straight retaining ring Richard Mueller 2000-12-05
D434498 Indirect ophthalmoscopy lens two piece retaining ring Richard Mueller 2000-11-28
5986801 Image reinverter for stereo microscope Fernando Diaz-Estevez 1999-11-16
5963301 Lense arrangement for vitreoretinal surgery 1999-10-05
5886812 Microscope attachment 1999-03-23
5857475 Optical component cleaning apparatus 1999-01-12
5805269 High magnification indirect ophthalmoscopy lens device 1998-09-08
5784147 Indirect ophthalmoscopy lens system 1998-07-21
5757464 Indirect ophthalmoscopy contact lens device with compound contact lens element 1998-05-26
5745212 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 1998-04-28
5706073 Indirect ophthalmoscopy lens for use with split lamp or other biomicroscope 1998-01-06
5526074 Full field reinverting indirect contact ophthalmoscope 1996-06-11
5523810 Indirect ophthalmoscopy contact lens device with compound contact lens element 1996-06-04
5479222 Indirect ophthalmoscopy lens system and adapter lenses 1995-12-26
5440458 Illuminated lens case 1995-08-08
5436680 Indirect ophthalmoscopy lens providing apparent image curvature 1995-07-25
5430506 Indirect ophthalmoscopy lens for use with slit lamp biomicroscope 1995-07-04
5424789 Optical device for use with a slit lamp biomicroscope 1995-06-13
D357319 Indirect ophthalmoscopy lens retaining ring 1995-04-11