Issued Patents All Time
Showing 51–75 of 94 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 |
| 6489892 | Use of evaporatively activated color change for verifying the integrity of an object, such as a data storage medium or a gaming token | — | 2002-12-03 |
| 6488155 | Methods and apparatus employing multi-spectral imaging for the remote identification and sorting of objects | John A. Moon | 2002-12-03 |
| 6441380 | Coding and authentication by phase measurement modulation response and spectral emission | — | 2002-08-27 |
| 6370216 | Thickness sensor suitable for detecting a presence of a plurality of items, such as currency | John A. Moon | 2002-04-09 |
| 6338933 | Methods and apparatus for rendering an optically encoded medium unreadable | Charles M. Zepp, Kenneth S. Norland | 2002-01-15 |
| 6296189 | Methods and apparatus employing multi-spectral imaging for the remote identification and sorting of objects | John A. Moon | 2001-10-02 |
| 6259506 | Field activated security articles including polymer dispersed liquid crystals, and including micro-encapsulated field affected materials | — | 2001-07-10 |
| 6254596 | Solid state source for generating intense light for photomedicine | — | 2001-07-03 |
| 6233481 | Diagnostic application of sono-chemical excitation of fluorescent photosensitizers | — | 2001-05-15 |
| 6100973 | Methods and apparatus for performing microanalytical techniques using photolithographically fabricated substrates having narrow band optical emission capability | — | 2000-08-08 |
| 6088380 | Method and apparatus for intracavity pixelated lasing projection | — | 2000-07-11 |
| 6047964 | Scratch card, and method and apparatus for validation of the same | John A. Moon | 2000-04-11 |
| 6030411 | Photoemitting catheters and other structures suitable for use in photo-dynamic therapy and other applications | — | 2000-02-29 |
| 5943354 | Optical sources having a strongly scattering gain medium providing laser-like action | — | 1999-08-24 |
| 5919607 | Photo-encoded selective etching for glass based microtechnology applications | — | 1999-07-06 |
| 5908608 | Synthesis of metal chalcogenide quantum | Charles M. Zepp, Richard F. Rossi | 1999-06-01 |
| 5903340 | Optically-based methods and apparatus for performing document authentication | Timothy James Driscoll | 1999-05-11 |
| 5881886 | Optically-based methods and apparatus for sorting garments and other textiles | — | 1999-03-16 |
| 5882779 | Semiconductor nanocrystal display materials and display apparatus employing same | — | 1999-03-16 |
| 5851225 | Photoemitting catheters and other structures suitable for use in photo-dynamic therapy and other applications | — | 1998-12-22 |
| 5845640 | Chemiluminescent sources for photodynamic therapy and photomedicine | — | 1998-12-08 |