Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DK

Dan Katzman

E-E-Vision: 10 patents #4 of 31Top 15%
SIShamir Optical Industry: 5 patents #5 of 38Top 15%
AOAddon Optics: 2 patents #4 of 4Top 100%
Givat Ela, IL: #2 of 29 inventorsTop 7%
Overall (All Time): #247,980 of 4,157,543Top 6%
18 Patents All Time

Issued Patents All Time

Showing 1–18 of 18 patents

Patent #TitleCo-InventorsDate
12416820 Progressive lens and manufacture thereof Haim Engler 2025-09-16
11378821 Progressive lens and method of manufacture thereof Haim Engler 2022-07-05
9164295 Vision prescription, measuring method and measuring apparatus, and a lens production method Yuval Carmon 2015-10-20
7997733 System, apparatus and method for correcting vision with an adaptive optic Ronald D. Blum, Dwight P. Duston 2011-08-16
7828433 Assymetrical progressive lens Gabby Weinrot 2010-11-09
7744214 System, apparatus and method for correcting vision with an adaptive optic Ronald D. Blum, Dwight P. Duston 2010-06-29
7524059 System, apparatus and method for correcting vision with an adaptive optic Ronald D. Blum, Dwight P. Duston 2009-04-28
7322696 Customized lens, and system and method of producing thereof Giora Ben-Zeev, Haim Hainebach, Yuval Carmon 2008-01-29
7296357 Device and method of measuring a personalized lens-orientation value 2007-11-20
7234809 Ophthalmic spectacle lens for correcting non-conventional refractive error Ronald D. Blum, Dwight P. Duston 2007-06-26
7188948 System, apparatus and method for correcting vision with an adaptive optic Ronald D. Blum, Dwight P. Duston 2007-03-13
7077519 System, apparatus, and method for correcting vision using an electro-active lens Ronald D. Blum, Dwight P. Duston 2006-07-18
6918670 System, apparatus, and method for correcting vision using an electro-active lens Ronald D. Blum, Dwight P. Duston 2005-07-19
6786600 Methods for generating a progressive surface and for production of multifocal progressive lenses Yuval Carmon 2004-09-07
6733130 Method for refracting and dispensing electro-active spectacles Ronald D. Blum, Dwight P. Dustin 2004-05-11
6491391 System, apparatus, and method for reducing birefringence Ronald D. Blum, Dwight P. Dustin, Youval Katzman, Israel Grossinger, Uzi Efron 2002-12-10
6491394 Method for refracting and dispensing electro-active spectacles Ronald D. Blum, Dwight P. Dustin 2002-12-10
6302540 Method for the design of multifocal optical elements Jacob Rubinstein 2001-10-16