Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820914 | Gain control of photomultiplier tubes used in detecting differential absorption lidar returns | — | 1989-04-11 |
| 4800043 | Colorants for ball point pen and ribbon inks derived from pararosaniline process residue | Louis Rolando de Alvare, Floyd G. Spence | 1989-01-24 |