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Force multiplying press
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Patent number 4,916,932
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Issue date Apr 17, 1990
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Lamb Robo, Inc.
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Robert E. Obrecht
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Clinching tool
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Patent number 4,803,767
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Issue date Feb 14, 1989
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Lamb Robo
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Robert E. Obrecht
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Self equalizing piercing machine
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Patent number 4,763,550
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Issue date Aug 16, 1988
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Lamb Robo
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Edward J. Waltonen
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR