Allan J. Waldorf

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Kemptville, CA

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Patents Grantslast 30 patents

Information Patent Grant
Form depicting, optical interference authenticating device
- Patent number 5,009,486
- Issue date Apr 23, 1991
- Canadian Patents and Development Limited/Societe Canadienne des Brevets et d'...
- Jerzy A. Dobrowolski
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Method of manufacturing an optical interference authenticating device
- Patent number 4,626,445
- Issue date Dec 2, 1986
- Canadian Patents and Development Limited
- Jerzy A. Dobrowolski
- G06 - COMPUTING CALCULATING COUNTING