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US4020996A
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Method and apparatus for winding elongated coils
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Memory matrix
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Reed switch relay
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Electromechanical actuator
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Piezoelectrically actuated lever switch
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Actuator mechanism
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US3623082A
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Keyboard assembly
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US3629811A
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Terminal for assembly into a terminal block
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Method of sealing reed switches using infrared energy
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Shift register and decoder using sealed reed switches
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Armature structure for reed switches
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US3591775A
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Shift register using sealed reed switches
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US3518411A
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Infrared heating apparatus for sealing reed switches
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Quick detachable stepping switch
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Matrix board apparatus
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Mercury-wetted contact switch
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Change-of-state detector
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US3495218A
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Data transmitting system utilizing shift registers and line relays
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US3437740A
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Matrix board apparatus
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US3495044A
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Common control telephone system using tone and dial signaling
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