Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5462072 | Removal of nicotine from tobacco smoke | Raymond M. Robertson | 1995-10-31 |
| 4821750 | Cigarette filters | — | 1989-04-18 |
| 4744932 | Process for forming a skinless hollow fiber of a cellulose ester | — | 1988-05-17 |
| 4469112 | Compound filter | Charles H. Keith, Peter Bohlander | 1984-09-04 |
| 4460001 | Process for preparing compound filter | Charles H. Keith, Peter Bohlander | 1984-07-17 |