Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328667 | Field-emission ion source and ion thruster apparatus comprising such sources | Dominique Valentian, Heinrich A. Pfeffer, Hans-Joachim Herhudt V. Rohden, Duncan Stewart | 1982-05-11 |