Widerby; Lennart
Patent Applications and Registrations
Patent applications and USPTO patent grants for Widerby; Lennart.The latest application filed is for "exhaust air valve".
- Widerby; Lennart - Jonkoping SE
| Patent | Date |
|---|---|
| Exhaust air valve Grant D278,079 - Widerby March 19, 1 | 1985-03-19 |
| Adjustable ventilation nozzle Grant D273,702 - Widerby , et al. May 1, 1 | 1984-05-01 |
| Ventilation element with tubular connector for insertion into an opening in a ceiling or a wall Grant 4,109,564 - Widerby August 29, 1 | 1978-08-29 |
| Air jet nozzle and system Grant 3,987,713 - Larkfeldt , et al. October 26, 1 | 1976-10-26 |
| Arrangement At Buildings Assembled Of Pre-fabricated Wall And Roof Element Grant 3,748,803 - Widerby , et al. July 31, 1 | 1973-07-31 |
| Joint Between Fireproof And Pressuretight Wall And Ceiling Elements Grant 3,724,886 - Widerby April 3, 1 | 1973-04-03 |
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