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Pipe component seal assembly
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Patent number 5,301,983
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Issue date Apr 12, 1994
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Jan S. Porowski
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Cooling apparatus
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Patent number 4,949,781
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Issue date Aug 21, 1990
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SMC O'Donnell Inc.
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Jan S. Porowski
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F28 - HEAT EXCHANGE IN GENERAL
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Tube expander
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Patent number 4,781,046
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Issue date Nov 1, 1988
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O'Donnell & Associates, Inc.
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Jan S. Porowski
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Mechanical stress improvement process
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Patent number 4,612,071
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Issue date Sep 16, 1986
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O'Donnell & Associates, Inc.
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William J. O'Donnell
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Pipelock
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Patent number 4,572,548
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Issue date Feb 25, 1986
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O'Donnell & Associates, Inc.
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Jan S. Porowski
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...