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3297929
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Patent number 3,297,929
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Issue date Jan 10, 1967
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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3251039
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Patent number 3,251,039
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Issue date May 10, 1966
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G05 - CONTROLLING REGULATING
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Patent number 2,982,143
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Issue date May 2, 1961
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2941136
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Patent number 2,941,136
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Issue date Jun 14, 1960
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G05 - CONTROLLING REGULATING