Johnsen; Frank Birger
Patent Applications and Registrations
Patent applications and USPTO patent grants for Johnsen; Frank Birger.The latest application filed is for "centrifuge comprising an outer drum and an inner rotor provided with a conveyor screw".
- Johnsen; Frank Birger - Virum DK
| Patent | Date |
|---|---|
| Centrifuge comprising an outer drum and an inner rotor provided with a conveyor screw Grant 3,971,509 - Johnsen July 27, 1 | 1976-07-27 |
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