Paul L. Dreyer

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Allentown, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sliding blade closure apparatus with inflatable sealing ring
- Patent number 4,561,472
- Issue date Dec 31, 1985
- Ecolaire Incorporated
- Paul L. Dreyer
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Flexible seals for sliding blade dampers
- Patent number 4,491,144
- Issue date Jan 1, 1985
- Paul L. Dreyer
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Sliding blade apparatus for closing conduits
- Patent number 4,474,205
- Issue date Oct 2, 1984
- Ecolaire Incorporated
- Paul L. Dreyer
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...