RK

Ronald Krefman

📍 Highland Park, IL: #157 of 599 inventorsTop 30%
🗺 Illinois: #21,447 of 84,256 inventorsTop 30%
Overall (All Time): #1,232,128 of 4,157,543Top 30%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
8147063 Method for minimizing prism in over-the-counter eyeglasses and optical devices 2012-04-03
7568798 Display for eyeglasses with multiple optical center distances and method for displaying such eyeglasses 2009-08-04
D525278 Eyeglasses 2006-07-18
D518846 Eyeglasses 2006-04-11