Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5741068 | Temperature derivative sensing and regulating device and method | Johann Hemmerich, Luigi Serio | 1998-04-21 |
| 5729984 | Evaporative transpiration pump having a heater and a pouous body | Johann Ludwig Hemmerrich | 1998-03-24 |
| 5611208 | Modified cryogenic diffusion pump | Johann Hemmerich | 1997-03-18 |