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Control-safe capacitive switch
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Patent number 5,233,231
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Issue date Aug 3, 1993
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Pepperl + Fuchs, Inc.
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Hermann Wieth
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3801219
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Patent number 3,801,219
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Issue date Apr 2, 1974
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B64 - AIRCRAFT AVIATION COSMONAUTICS
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3306413
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Patent number 3,306,413
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Issue date Feb 28, 1967
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B30 - PRESSES
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2701043
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Patent number 2,701,043
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Issue date Feb 1, 1955
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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2195014
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Patent number 2,195,014
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Issue date Mar 26, 1940
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1957835
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Patent number 1,957,835
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Issue date May 8, 1934
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1655587
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Patent number 1,655,587
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Issue date Jan 10, 1928
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1519369
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Patent number 1,519,369
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Issue date Dec 16, 1924
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...