Inventor
FAHRENSCHON FRANZ
DE3 patents
Patents
3 patentsUS4009342AFeb 22, 1977
Circuit arrangement for communication facilities wherein transmission paths can be employed for different types of message switching
SIEMENS AG45 citations89
US4288662ASep 8, 1981
Circuit arrangement for telephone exchange systems, especially subscriber extension station installations, with additional data traffic, for example with teleprinter equipment
SIEMENS AG2 citations58
US4187414AFeb 5, 1980
Circuit arrangement for an interference data alarm system in communication facilities, particularly in telephone equipment
SIEMENS AG3 citations50