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DC power distribution
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Patent number 6,181,027
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Issue date Jan 30, 2001
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International Business Machine Corp.
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Philip Edward Grady
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electrical interface circuit
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Patent number 5,157,274
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Issue date Oct 20, 1992
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Motorola, Inc.
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Roy E. Hunninghaus
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H03 - BASIC ELECTRONIC CIRCUITRY
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Load share system
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Patent number 4,748,340
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Issue date May 31, 1988
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Liberty Engineering, Inc.
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Robert J. Schmidt
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G05 - CONTROLLING REGULATING
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Control signal and isolation circuits
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Patent number 4,376,969
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Issue date Mar 15, 1983
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General Electric Company
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James F. Bedard
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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DC motor speed controller
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Patent number 4,153,853
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Issue date May 8, 1979
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Dail A. De Villeneuve
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Electric switch
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Patent number 4,121,113
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Issue date Oct 17, 1978
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Tektronix, Inc.
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Robert Edward White
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3906338
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Patent number 3,906,338
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Issue date Sep 16, 1975
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G08 - SIGNALLING
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3873849
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Patent number 3,873,849
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Issue date Mar 25, 1975
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G05 - CONTROLLING REGULATING
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3859594
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Patent number 3,859,594
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Issue date Jan 7, 1975
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G08 - SIGNALLING
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3818274
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Patent number 3,818,274
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Issue date Jun 18, 1974
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H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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3573774
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Patent number 3,573,774
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Issue date Apr 6, 1971
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G08 - SIGNALLING