Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867638 | Split ring seal of a centrifugal pump | Albert A. Handtmann, Gunter Haupt, Erwin Gebhard, Valentin Schroder | 1989-09-19 |
| D301404 | Hairbrush | — | 1989-06-06 |
| 4814161 | Drug-containing chlorofluorocarbon aerosol propellent formulations | Philip A. Jinks, Alexander Bell | 1989-03-21 |