Floating ground isolator for a communications cable locating...

Floating positive circuit breaker

Fluid circulating pump

Fluorescent lamp drive system with transformer over-voltage prot

Flux concentration adjustment mechanism and method for hall...

Foldback current limiting circuit

Foldback current limiting of a telephone line switch

Foldback switching material and devices

For the protection of an MOS-transistor from overloading

Forced commutation precipitator circuit

Forced-fusion fuse and circuit breaker

Four terminal pulse suppressor

Four terminal pulse suppressor

Four-pole circuit breaker

Four-pole to three-pole bussing for a network protector

Frequency converter having an intermediate circuit without...

Frequency dependent fuse for a telephone circuit or the like

Frequency dependent X-ray protection for a multimedia monitor

Frequency selective arc detection

Frequency selective transient voltage protector