Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7285802 | Illumination assembly and method of making same | Andrew J. Ouderkirk, Hung T. Tran, John C. Schultz, John A. Wheatley, Joseph A. Hoffman +3 more | 2007-10-23 |
| 6481882 | Light pipe fixture with internal extractor | — | 2002-11-19 |
| 6325550 | Thermally protective coupling for a light conduit lighting system | Joseph A. Hoffman, DuWayne C. Radke | 2001-12-04 |
| 6285814 | Light guide luminaire | — | 2001-09-04 |
| 6164782 | Self-contained lighted marking device | — | 2000-12-26 |
| 5976686 | Diffuse reflective articles | Scott R. Kaytor, Kenneth A. Epstein, John Christopher Harvey, Neal T. Strand, Clinton P. Waller, Jr. +2 more | 1999-11-02 |