Helfert; Matthias
Patent Applications and Registrations
Patent applications and USPTO patent grants for Helfert; Matthias.The latest application filed is for "window cleaning appliance".
- Helfert; Matthias - Winnenden DE
| Patent | Date |
|---|---|
| Window cleaning appliance Grant D874,771 - Meyer , et al. Fe | 2020-02-04 |
| Window cleaning appliance Grant D830,026 - Helfert , et al. October 2, 2 | 2018-10-02 |
| Window cleaning appliance Grant D828,665 - Helfert , et al. September 11, 2 | 2018-09-11 |
| Window cleaning appliance Grant D818,231 - Helfert , et al. May 15, 2 | 2018-05-15 |
| Electric vacuum cleaner Grant D792,040 - Meyer , et al. July 11, 2 | 2017-07-11 |
| Electric vacuum cleaner Grant D791,420 - Meyer , et al. July 4, 2 | 2017-07-04 |
| Vacuum cleaner Grant D789,627 - Helfert , et al. June 13, 2 | 2017-06-13 |
| Electric vacuum cleaner Grant D789,633 - Meyer , et al. June 13, 2 | 2017-06-13 |
| Window cleaning appliance Grant D769,560 - Helfert , et al. October 18, 2 | 2016-10-18 |
| Mounting device for a window cleaning appliance Grant D729,474 - Helfert , et al. May 12, 2 | 2015-05-12 |
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