Inventor
ANSELL JOHN W
GB3 patents
Patents
3 patentsUS4535442AAug 13, 1985
Digital switching network for telecommunications exchange
PLESSEY CO PLC13 citations71
US4530089AJul 16, 1985
Telecommunications digital switchblock utilizing control switch state maps
PLESSEY CO PLC4 citations60
US4858223AAug 15, 1989
Security arrangement for a telecommunications exchange system
PLESSEY CO PLC4 citations54