IP Library › Granted Patent US 5,144,483
Granted Patent Utility
US 5,144,483 · App. 07/662,137

Diffractive multifocal optical device

Inventor: Allen L. Cohen
Patented Case View Patent ↗
Granted: Sep 1, 1992 Filed: Apr 17, 1991
Inventor
Allen L. Cohen

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Quick Facts
Patent No.
US 5,144,483
App. No.
07/662,137
Filed
1991-04-17
Granted
1992-09-01
Kind
A