Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5324904 | Reactors for effecting chemical processes | David Cresswell, Ralph J. Doy | 1994-06-28 |
| 4849554 | Production of tetrafluoroethylene and hexafluoropropylene | David Cresswell | 1989-07-18 |