Knivsland; David P.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Knivsland; David P..The latest application filed is for "unitary respirator with molded thermoset elastomeric elements".
- Knivsland; David P. - North St. Paul MN
| Patent | Date |
|---|---|
| Unitary Respirator With Molded Thermoset Elastomeric Elements App 20180339178 - Flannigan; Paul J. ; et al. | 2018-11-29 |
| Unitary respirator with molded thermoset elastomeric elements Grant 10,065,056 - Flannigan , et al. September 4, 2 | 2018-09-04 |
| Unitary Respirator With Molded Thermoset Elastomeric Elements App 20150128936 - Flannigan; Paul J. ; et al. | 2015-05-14 |
| Respirator facepiece with thermoset elastomeric face seal Grant 8,820,326 - Flannigan , et al. September 2, 2 | 2014-09-02 |
| Unitary Respirator With Molded Thermoset Elastomeric Elements App 20100218761 - Flannigan; Paul J. ; et al. | 2010-09-02 |
| Respirator Facepiece With Thermoset Elastomeric Face Seal App 20100206311 - Flannigan; Paul J. ; et al. | 2010-08-19 |
| Full-face respirator lens Grant D426,298 - Grannis , et al. June 6, 2 | 2000-06-06 |
| Inlet port adaptor on a full-face respirator lens Grant D421,118 - Reischel , et al. February 22, 2 | 2000-02-22 |
| Full face respirator mask having integral connectors disposed in lens area Grant 5,924,420 - Reischel , et al. July 20, 1 | 1999-07-20 |
| Full face respirator lens Grant D409,744 - Grannis , et al. May 11, 1 | 1999-05-11 |
| Full face respirator lens Grant D388,872 - Grannis , et al. January 6, 1 | 1998-01-06 |
| Full face respirator Grant D378,610 - Reischel , et al. March 25, 1 | 1997-03-25 |
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