Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5009486 | Form depicting, optical interference authenticating device | Jerzy A. Dobrowolski, Fang-Chuan Ho | 1991-04-23 |
| 4626445 | Method of manufacturing an optical interference authenticating device | Jerzy A. Dobrowolski | 1986-12-02 |