Estkowski; Christopher G.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Estkowski; Christopher G..The latest application filed is for "reusable respiratory protection device".
- Estkowski; Christopher G. - Pullman MI
- Estkowski; Christopher G. - St. Joseph MI
- Estkowski; Christopher G. - Coloma MI
| Patent | Date |
|---|---|
| Reusable Respiratory Protection Device App 20210023326 - Heimbuch; Brian K. ; et al. | 2021-01-28 |
| Reusable Respiratory Protection Device App 20200360645 - Heimbuch; Brian K. ; et al. | 2020-11-19 |
| Reusable respiratory protection device Grant 10,835,704 - Heimbuch , et al. November 17, 2 | 2020-11-17 |
| Hoods, Respirator Hoods, And Other Articles Including Joined Thermoplastics And Elastomers, And Related Methods App 20200206544 - VAUGHAN; Kenneth ; et al. | 2020-07-02 |
| Filter asssembly for a respirator Grant 9,352,268 - Fiet , et al. May 31, 2 | 2016-05-31 |
| Filter Asssembly For A Respirator App 20130298775 - Fiet; Richard A. ; et al. | 2013-11-14 |
| Adapter for air purifying filter App 20080053447 - Ratajczak; John A. ; et al. | 2008-03-06 |
| Combination filter/cartridge assembly Grant 6,783,566 - Estkowski August 31, 2 | 2004-08-31 |
| Combination filter/cartridge assembly App 20020069762 - Estkowski, Christopher G. | 2002-06-13 |
| Vertical back adjust for chairs Grant 5,232,265 - Estkowski , et al. August 3, 1 | 1993-08-03 |
| Caster bearing assembly Grant 5,230,571 - Estkowski , et al. July 27, 1 | 1993-07-27 |
| Integral retainer and bearing assembly Grant 5,226,739 - Estkowski , et al. July 13, 1 | 1993-07-13 |
| Dual wheel tilted axle caster with an integral retainer and bearing assembly Grant 5,068,943 - Estkowski , et al. December 3, 1 | 1991-12-03 |
| Chair base Grant D321,299 - Caruso , et al. * November 5, 1 | 1991-11-05 |
| Caster with arcurate hood cover Grant D308,815 - Caruso , et al. June 26, 1 | 1990-06-26 |
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