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Rotatable shaft position indicator
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Patent number 7,739,978
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Issue date Jun 22, 2010
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Metso Automation USA Inc.
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Bryan A. Beckman
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Modular valve position indicator
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Patent number 5,647,396
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Issue date Jul 15, 1997
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Stonel Corporation
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Wallace F. Stommes
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Modular valve position indicator
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Patent number 5,623,963
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Issue date Apr 29, 1997
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Stonel Corporation
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Wallace F. Stommes
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Valve position indicator
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Patent number 5,223,822
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Issue date Jun 29, 1993
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Stonel Corporation
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Wallace F. Stommes
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...