DP

Donald H. Petcen

CI Coburn Optical Industries: 5 patents #4 of 46Top 9%
EC E. R. Carpenter Company: 2 patents #6 of 14Top 45%
📍 Colonial Heights, VA: #3 of 59 inventorsTop 6%
🗺 Virginia: #4,439 of 34,511 inventorsTop 15%
Overall (All Time): #767,075 of 4,157,543Top 20%
7
Patents All Time

Issued Patents All Time

Showing 1–7 of 7 patents

Patent #TitleCo-InventorsDate
5211311 Cartridge for a dispenser of reactive chemicals 1993-05-18
5090814 Dispenser for reactive chemicals 1992-02-25
4623708 Prepolymerization of monomer compositions containing diethylene glycol bis(allyl carbonate) Robert I. Ezrielev, Melvin E. Kamen 1986-11-18
4543146 Wrinkle prevention in glass/plastic composite lenses 1985-09-24
4540532 Method and apparatus for molding ophthalmic lenses Robert I. Sinclair 1985-09-10
4494344 Wrinkle prevention frame for lens manufacture 1985-01-22
4495015 Controlled wafer relaxing in making composite lenses 1985-01-22