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Heat sensing apparatus
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Patent number 4,308,517
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Issue date Dec 29, 1981
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Jenoff, Incorporated
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Reuben E. Peterson
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H01 - BASIC ELECTRIC ELEMENTS
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Material sensing switch
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Patent number 4,044,209
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Issue date Aug 23, 1977
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Jenoff, Incorporated
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Reuben E. Peterson
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H01 - BASIC ELECTRIC ELEMENTS
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Material sensing switch
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Patent number 4,031,342
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Issue date Jun 21, 1977
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Reuben E. Peterson
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H01 - BASIC ELECTRIC ELEMENTS