David A. Ratner

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Walnut Creek, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Air flow damping system
- Patent number 4,312,381
- Issue date Jan 26, 1982
- Aladdin Heating Corporation
- David A. Ratner
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...