Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867182 | Temperature/humidity controlled valve for a smoking article | David W. Boldridge | 1989-09-19 |
| 4819665 | Aerosol delivery article | Carl C. Morrison, Johnny L. Brooks, Evon Llewellyn Crooks, Bradley J. Ingebrethsen | 1989-04-11 |