Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6943698 | Enhanced visibility traffic signal | Barbara L. Marcum, Jerry A. Williams, Priscilla Williams | 2005-09-13 |
| 6693556 | Enhanced visibility traffic signal | Barbara L. Marcum, Jerry A. Williams, Priscilla Williams | 2004-02-17 |
| 6053623 | Waterproof light with multi-faceted reflector in a flexible enclosure | Barbara L. Marcum | 2000-04-25 |
| 5827490 | Method for converting urea to ammonia | — | 1998-10-27 |
| 5281403 | Method for converting urea to ammonia | — | 1994-01-25 |
| 5252298 | Device for cleaning gases | — | 1993-10-12 |
| 5240689 | Process using two-stage boiler injection for reduction of nitrogen | — | 1993-08-31 |
| 5120508 | Apparatus for removing oxides of nitrogen and sulfur from combustion gases | — | 1992-06-09 |
| 4881956 | Method and device for cleaning particulate-laden gases | — | 1989-11-21 |
| 4783325 | Process and apparatus for removing oxides of nitrogen and sulfur from combustion gases | — | 1988-11-08 |
| 4544379 | Method for metal halide removal | Henry H. Elliott, Lawrence R. Lepovitz | 1985-10-01 |