Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336306 | Electrostatic imaging sheet | — | 1982-06-22 |
| 4311479 | Method of indicating the presence of an impregnant in a substrate | David FENN | 1982-01-19 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336306 | Electrostatic imaging sheet | — | 1982-06-22 |
| 4311479 | Method of indicating the presence of an impregnant in a substrate | David FENN | 1982-01-19 |