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United States Utility Patents
5,004,870 - 5,004,879

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NumberTitle
5,004,870 Polar co-ordinate digitizer
5,004,871 Digitizer stylus having side switch
5,004,872 Digitizer tablet with pressure stylus
5,004,873 Plural set point pressure responsive switching apparatus utilizing a single pressure sensing driver element
5,004,874 Direct current switching apparatus
5,004,875 Stored energy contact operating mechanism
5,004,876 Pressure responsive switch particularly adaptable for operation as a normally open or a normally closed switch
5,004,877 Vacuum interrupter
5,004,878 Molded case circuit breaker movable contact arm arrangement
5,004,879 Switch housing with resilient retainers



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