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Coil spring with guide rollers
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Patent number 4,925,164
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Issue date May 15, 1990
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General Motors Corporation
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Leonard F. Kopich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Hood for video terminals
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Patent number 4,569,572
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Issue date Feb 11, 1986
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Leonard F. Kopich
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G06 - COMPUTING CALCULATING COUNTING
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Sunroof latch
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Patent number 4,527,822
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Issue date Jul 9, 1985
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General Motors Corporation
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Leonard F. Kopich
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B60 - VEHICLES IN GENERAL
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Hydraulically controlled differential
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Patent number 4,272,993
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Issue date Jun 16, 1981
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General Motors Corporation
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Leonard F. Kopich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Four way pawl clutch
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Patent number 4,222,473
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Issue date Sep 16, 1980
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General Motors Corporation
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Leonard F. Kopich
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Rotary machine apex seal
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Patent number 3,937,603
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Issue date Feb 10, 1976
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General Motors Corporation
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Leonard F. Kopich
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES