Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880138 | Cover assembly for a drum composed of synthetic resin | Pierre Pfeiffer, Paul Sigwalt | 1989-11-14 |
| 4817811 | Outlet device for a fluid container | Pierre Pfeiffer, Paul Sigwalt | 1989-04-04 |
| 4795057 | Transport and/or storage container, particularly for a fluid and/or a fine grained loose material | Erwin Jungels, Pierre Pfeiffer, Paul Sigwalt | 1989-01-03 |