Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6633370 | Quantum dots, semiconductor nanocrystals and semiconductor particles used as fluorescent coding elements | — | 2003-10-14 |
| 6578712 | Methods and apparatus employing multi-spectral imaging for the remote identification and sorting of objects | John A. Moon | 2003-06-17 |
| 6552290 | Optically-based methods and apparatus for performing sorting coding and authentication using a gain medium that provides a narrowband emission | — | 2003-04-22 |
| 6531262 | Methods and apparatus for rendering an optically encoded medium unreadable and tamper-resistant | Charles M. Zepp, Andrei Smuk, Marianne Krieg-Kowald | 2003-03-11 |