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US4354226A
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Communication terminal for interconnecting programmable controllers in a loop
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US4174472A
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Pivoted-actuator switch with integral off-lock
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US4166935A
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Alternately-operable two-pushbutton switch
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US4149052A
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Safety-disconnect power tool switch
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US4168416A
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Guarded safety switch with integral off-lock and actuator non-removable in on position
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US4146856A
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Shutterless fiber optic switch
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US4149049A
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Switch using resilient annular contactor
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US4159483A
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Low profile force indicating fastener, especially for semiconductor clamps
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US4137490A
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Trigger speed control switch
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US4162386A
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Method of and means for securing an electric switch operating lever in a one-hole mounting bushing
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US4121065A
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Toggle switch lever lock
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US4134080A
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Low inductance resistor
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US4144410A
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Multiplex communication system
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US4132875A
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Yarn detector switch with snap-on trapper
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US4160138A
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Switch with indexing detent block
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US4158829A
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Electromagnetically operated DC power contactor
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US4149122A
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Wideband tracking generator for harmonic mixing receivers
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US4138646A
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Wideband absolute calibration system
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US4138645A
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Wideband signal calibration system
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US4110585A
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Grounded lever toggle switch
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