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BROADBAND DIFFRACTIVE LENS OR IMAGING ELEMENT

07/683,592 | U.S. Patent Application

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Location FILE REPOSITORY (FRANCONIA)
Filed April 9, 1991
Examiner JAY RYAN
Class 359
Art Group 2507
Patent No. 5,257,132
Case Type Utility - 359/565000
Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
Parent 07/587,699 Patented
Last Updated: 5 years ago
Date # Transaction