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Patent applications and USPTO patent grants for Stemmer; Michael J..The latest application filed is for "two-stage air filter with multiple-layer stage and post-filter stage".
Patent | Date |
---|---|
Two-stage air filter with multiple-layer stage and post-filter stage Grant 6,156,089 - Stemmer , et al. December 5, 2 | 2000-12-05 |
Forced air system air filter Grant 5,922,096 - Stemmer July 13, 1 | 1999-07-13 |
Multiple layer air filter media Grant 5,858,045 - Stemmer , et al. January 12, 1 | 1999-01-12 |
Forced air system air filter Grant 5,704,953 - Stemmer January 6, 1 | 1998-01-06 |
Frame and pad filter system Grant 5,571,300 - Stemmer November 5, 1 | 1996-11-05 |
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