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US2172423A
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Electric circuit breaker
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US2144421A
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Rectifier of heavy electric currents
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US2145468A
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Circuit breaker
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GB471245A
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Method and apparatus for sparklessly interrupting heavy electric currents
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GB468140A
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Process and device for interrupting heavy electric currents
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GB413119A
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Synchronous-motor clock
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GB413109A
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Process for producing walls, roofs and floors
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GB396155A
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An interrupter for adjusting or rectifying electric currents
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GB348387A
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Process for the manufacture of footwear
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US2140343A
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Circuit-breaker for regulating the intensity of and rectifying electric currents
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US1921711A
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Process of producing water gas
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US1736950A
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Means for fastening postage stamps in albums
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GB139811A
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Method of making detonators and fuses for detonators
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