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Patent CA944987A successfully refreshed from Google Patents.
CA944987A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Optical interference authenticating means
Assignee: National Research Council Canada
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Filing: 1972-01-18
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Granted: 1974-04-09
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Expires: 1992-01-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth M. Baird
- 👤 Jerzy A. Dobrowolski
- 👤 Philip D. Carman
- 👤 Allan J. Waldorf
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-10-27 19:06
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/20; G02B5/28; G02B5/285; G07; G07D; G07D7/00; G07D7/06; G07D7/12; G07D7/1205
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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