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Method of making camshaft
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Patent number 4,969,262
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Issue date Nov 13, 1990
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Nippon Piston Ring Co., Ltd.
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Takeshi Hiraoka
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B22 - CASTING POWDER METALLURGY
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2330968
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Patent number 2,330,968
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Issue date Oct 5, 1943
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2291035
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Patent number 2,291,035
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Issue date Jul 28, 1942
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2261108
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Patent number 2,261,108
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Issue date Nov 4, 1941
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2174084
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Patent number 2,174,084
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Issue date Sep 26, 1939
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2156153
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Patent number 2,156,153
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Issue date Apr 25, 1939
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2138522
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Patent number 2,138,522
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Issue date Nov 29, 1938
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2126462
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Patent number 2,126,462
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Issue date Aug 9, 1938
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2057939
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Patent number 2,057,939
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Issue date Oct 20, 1936
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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2033686
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Patent number 2,033,686
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Issue date Mar 10, 1936
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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1861055
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Patent number 1,861,055
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Issue date May 31, 1932
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B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR