Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829046 | Positive-acting thermographic materials | — | 1989-05-09 |
| 4808565 | Thermal imaging material | Jon A. Bjork | 1989-02-28 |
DW
David R. Whitcomb
Overall (1989): #29,222 of 140,708Top 25%
2
Patents 1989