David J. Twichell

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Ashville, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Twist indicator gasket
- Patent number 5,076,557
- Issue date Dec 31, 1991
- Blackstone Corporation
- Paul K. Beatenbough
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Twist indicator gasket
- Patent number 5,031,924
- Issue date Jul 16, 1991
- Blackstone Corporation
- Paul K. Beatenbough
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Joint crevice corrosion inhibitor
- Patent number 4,997,035
- Issue date Mar 5, 1991
- Blackstone Corporation
- Paul K. Beatenbough
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
After cooler, charge air cooler and turbulator assemblies and metho...
- Patent number 4,501,321
- Issue date Feb 26, 1985
- Blackstone Corporation
- John D. Real
- F28 - HEAT EXCHANGE IN GENERAL