Royle; David John
Patent Applications and Registrations
Patent applications and USPTO patent grants for Royle; David John.The latest application filed is for "smoke ventilation".
- Royle; David John - Oadby GB
- Royle; David John - Leicestershire GB
| Patent | Date |
|---|---|
| Smoke ventilation Grant 11,167,156 - Royle , et al. November 9, 2 | 2021-11-09 |
| Smoke Ventilation App 20190314653 - Royle; David John ; et al. | 2019-10-17 |
| Smoke ventilation Grant 10,265,552 - Royle , et al. | 2019-04-23 |
| Smoke Ventilation App 20140248833 - Royle; David John ; et al. | 2014-09-04 |
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