Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638820 | Puff control cigarette | Donald L. Roberts, Anthony L. Angel, Douglas C. Clark, Jack F. Clearman | 1987-01-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4638820 | Puff control cigarette | Donald L. Roberts, Anthony L. Angel, Douglas C. Clark, Jack F. Clearman | 1987-01-27 |