Ostbo; John David Bertil
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ostbo; John David Bertil.The latest application filed is for "heat-exchanger comprising a plurality of helically wound pipe elements".
- Ostbo; John David Bertil - 52 Sodertalje SW
| Patent | Date |
|---|---|
| Heat-exchanger Comprising A Plurality Of Helically Wound Pipe Elements Grant 3,746,084 - Ostbo July 17, 1 | 1973-07-17 |
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