Kroetsch; David
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kroetsch; David.The latest application filed is for "folding propellers system".
- Kroetsch; David - Waterloo CA
- Kroetsch; David - Kitchener CA
| Patent | Date |
|---|---|
| Folding propellers system Grant 10,155,585 - Johannesson , et al. Dec | 2018-12-18 |
| Hovering unmanned aerial vehicle Grant 9,783,294 - Johannesson , et al. October 10, 2 | 2017-10-10 |
| Folding Propellers System App 20160001879 - Johannesson; Glen ; et al. | 2016-01-07 |
| Hovering Unmanned Aerial Vehicle App 20150259066 - Johannesson; Glen ; et al. | 2015-09-17 |
| Hovering aerial vehicle with removable rotor arm assemblies Grant 8,322,648 - Kroetsch , et al. December 4, 2 | 2012-12-04 |
| Hovering Aerial Vehicle With Removable Rotor Arm Assemblies App 20090283629 - KROETSCH; David ; et al. | 2009-11-19 |
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