Janek Porowski

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Pittsburgh, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Process and apparatus for pressing an external sleeve onto a tube f...
- Patent number 6,189,768
- Issue date Feb 20, 2001
- Columbian Chemicals Company
- Janek Porowski
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Mechanical heat-exchange tube sealing system
- Patent number 5,538,261
- Issue date Jul 23, 1996
- Columbian Chemicals Company
- Wallace G. Murray
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Expansion joint for reactor or heat exchanger
- Patent number 4,434,840
- Issue date Mar 6, 1984
- O'Donnell & Associates Inc.
- Janek S. Porowski
- F28 - HEAT EXCHANGE IN GENERAL