Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4485866 | Heat absorber structure, particularly a plasma beam absorber | Johann Hemmerich, Helmut Fraenkle | 1984-12-04 |
| 4439684 | Accelerating grid | Johann Hemmerich, Helmut Frankle | 1984-03-27 |
| 4431488 | Heat absorber structure, particularly a plasma beam absorber and method of manufacturing the structure | Johann Hemmerich, Helmut Fraenkle | 1984-02-14 |