Inventor · disambiguated record
Ronald Krefman
Also filed as: KREFMAN RONALD
4 granted patents·1 pending application·200 citations·filing 2003–2009
75Inventor score
Technology areasG02C
Top patents by PatentIndex Score
5 records- 0193USD525278SEyeglassesKREFMAN RONALD·Filed 2003·Granted Jul 18, 2006·191 cites·1 claims
- 0250US8147063B2Method for minimizing prism in over-the-counter eyeglasses and optical devicesKREFMAN RONALD·Filed 2009·Granted Apr 3, 2012·2 cites·25 claims
- 0342USD518846SEyeglassesKREFMAN RONALD·Filed 2003·Granted Apr 11, 2006·6 cites·1 claims
- 0441US7568798B2Display for eyeglasses with multiple optical center distances and method for displaying such eyeglassesOTC OPTICS LLC·Filed 2006·Granted Aug 4, 2009·1 cites·25 claims
- 0536US2007035695A1Improved reading eyeglassesKREFMAN RONALD·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →