Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357021 | Ferrofluid rotary-shaft seal apparatus and method | Alan Schwartzman | 1982-11-02 |
| 4357022 | Ferrofluid rotary-shaft seal apparatus and method | — | 1982-11-02 |
| 4357024 | Ferrofluid rotary-shaft seal apparatus and method | — | 1982-11-02 |
| 4340233 | Ferrofluid seal apparatus | Akira Yamamura | 1982-07-20 |