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CA604608A
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Electro magnetic devices
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CA767830A
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Galvanometer employing photoelectric limiting
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CA738615A
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Photosensitive control circuit
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CA604691A
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Stepping electric motor
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CA770257A
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Series 46 relay
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CA900541A
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Non-polarized magnetic reed switch
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CA687844A
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Sensitive relay
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CA738076A
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Dry reed relay with adjustable operative values
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CA790193A
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Electrical coupling device
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CA738094A
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Power factor correction apparatus for alternating current power distribution systems
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CA635302A
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Polarized electromagnetic relay
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CA757266A
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Self-regulating galvanometer
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