Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4294882 | Heat-sealable antistatic polypropylene films | David J. C. Espley, William J. M. Philpott | 1981-10-13 |
| 4198256 | Method of making a heat-sealable oriented polypropylene film | William J. M. Philpott | 1980-04-15 |