Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11779175 | Apparatus, system and method for vacuum with switchable collection chamber | — | 2023-10-10 |
| 10910956 | Method for operating a frequency converter and frequency converter | Fritz Witte, Dirk Duesterberg | 2021-02-02 |
| 4794102 | Thermally-responsive record material | Dean G. Dalebroux | 1988-12-27 |
| 4675707 | Thermally-responsive record material | Steven L. Vervacke | 1987-06-23 |