Financial transmission system
Finger stop for a movable finger stop-type rotary dial
Fire alarm system
First aid information for cellular telephones and electronic...
First dialed digit detector and comparator
Fixed cellular terminal
Fixing hook for charging of electric devices
Flash-cut of speech processing features in a telephone call
Flexible communication systems and methods
Flexible direct signaling system
Flexible rating of telecommunication calls
Flexible, tapeless, personalized auto-attendant telephone
Floating battery feed circuit
Floating battery feed circuit for telephone subscriber line...
Floating battery feed circuit using multifilar transformer
Floating dc current source for a subscriber loop circuit
Flow-through using an automated main distribution frame
Fluid cushion turntable video disc player
Fm-am communications system with portable unit
Foldable portable telephone