Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4630943 | Ferrofluid bearing and seal apparatus | Philip Stahl, Donald F. Wilcock | 1986-12-23 |
| 4526484 | Ferrofluid thrust and radial bearing assembly | Philip Stahl, Harry C. Rippel | 1985-07-02 |