Floating button design for a handheld computer
Fluid activated switch apparatus
Fluid-proof slide switch
Flux proof rotary switch
Foil keyboard with security system
Foldable pushbutton-input device
Folded circuit switch apparatus having multiple contacts
Folding keyboard
Force sense imparting type input apparatus
Four position two dome switch
Four-direction switch device
Four-directional control switch
Four-directional switching device
Four-pole low voltage circuit breaker
Four-way electrical switch
Four-way key switch control mechanism
Four-way rocker switch
Four-way slide switch
Fuel transfer system for a nuclear reactor
Full travel keyboard