Schoen; Donald W.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Schoen; Donald W..The latest application filed is for "air purifier with hermetic sealing".
- Schoen; Donald W. - St. Paul MN
- Schoen; Donald W. - Ramsey MN
- Schoen; Donald W. - Saint Paul MN
| Patent | Date |
|---|---|
| Air purifier with hermetic sealing Grant 4,345,923 - Schoen August 24, 1 | 1982-08-24 |
| Unitized gas-particulate filter and housing Grant 4,322,230 - Schoen , et al. March 30, 1 | 1982-03-30 |
| Mechanism for removing dust particles from an engine air cleaner Grant 4,266,953 - Matthys , et al. May 12, 1 | 1981-05-12 |
| Fluid flow modulator Grant 3,957,639 - Schoen , et al. May 18, 1 | 1976-05-18 |
| Protective System For Contaminated Atmosphere Grant 3,766,844 - Donnelly , et al. October 23, 1 | 1973-10-23 |
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