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Thermal pen
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Patent number 4,297,714
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Issue date Oct 27, 1981
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Nippon Toki Kabushiki Kaisha
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Kazunari Ando
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G01 - MEASURING TESTING
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3285266
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Patent number 3,285,266
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Issue date Nov 15, 1966
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
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2307248
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Patent number 2,307,248
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Issue date Jan 5, 1943
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G01 - MEASURING TESTING
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2303216
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Patent number 2,303,216
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Issue date Nov 24, 1942
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G01 - MEASURING TESTING
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2284795
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Patent number 2,284,795
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Issue date Jun 2, 1942
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G01 - MEASURING TESTING
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1998207
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Patent number 1,998,207
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Issue date Apr 16, 1935
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G01 - MEASURING TESTING
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1830987
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Patent number 1,830,987
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Issue date Nov 10, 1931
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G05 - CONTROLLING REGULATING