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Spindle drive
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Patent number 5,024,115
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Issue date Jun 18, 1991
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Asea Brown Boveri Aktiengesellschaft
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Walter Hahn
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H01 - BASIC ELECTRIC ELEMENTS
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Electric safety device
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Patent number 4,644,113
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Issue date Feb 17, 1987
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L. D. Huang
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H01 - BASIC ELECTRIC ELEMENTS
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3858133
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Patent number 3,858,133
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Issue date Dec 31, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3792618
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Patent number 3,792,618
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Issue date Feb 19, 1974
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H01 - BASIC ELECTRIC ELEMENTS
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3679852
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Patent number 3,679,852
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Issue date Jul 25, 1972
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H01 - BASIC ELECTRIC ELEMENTS
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3569641
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Patent number 3,569,641
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Issue date Mar 9, 1971
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3462563
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Patent number 3,462,563
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Issue date Aug 19, 1969
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H01 - BASIC ELECTRIC ELEMENTS
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3171920
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Issue date Mar 2, 1965
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H01 - BASIC ELECTRIC ELEMENTS
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2915913
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G05 - CONTROLLING REGULATING
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2672586
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Issue date Mar 16, 1954
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H01 - BASIC ELECTRIC ELEMENTS