Inventor
CHU PAK-JONG
CA17 patents
⚠️ This page may combine multiple inventors who share the name “CHU PAK-JONG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NORTHERN TELECOM LTD
12 patentsUS4313150AJan 26, 1982
Latching lever for printed circuit boards
NORTHERN TELECOM LTD130 citations96
US4972296ANov 20, 1990
Expandable modular switching unit
NORTHERN TELECOM LTD35 citations92
US4348559ASep 7, 1982
Rotary switch using a flexible circuit member
NORTHERN TELECOM LTD14 citations73
US4268726AMay 19, 1981
Multiple cantilever spring contact switch
NORTHERN TELECOM LTD13 citations73
US4218808AAug 26, 1980
Hinge having reproducible bearing friction
NORTHERN TELECOM LTD9 citations73
USD398927SSep 29, 1998
Telephone base station
NORTHERN TELECOM LTD12 citations72
US4709389ANov 24, 1987
Telephone hook switch with elastomeric contact member
NORTHERN TELECOM LTD10 citations70
US4647729AMar 3, 1987
Circuit board with contact positions, as used for telecommunications terminals and other apparatus
NORTHERN TELECOM LTD9 citations68
US4091244AMay 23, 1978
Multiple contact switch
NORTHERN TELECOM LTD11 citations68
US5752596AMay 19, 1998
Side operated key actuator
NORTHERN TELECOM LTD4 citations62
US4259558AMar 31, 1981
Multiple cantilever spring contact switch
NORTHERN TELECOM LTD3 citations55
US4049924ASep 20, 1977
Pushbutton dials
NORTHERN TELECOM LTD1 citations47
NORTHERN ELECTRIC CO
2 patentsUS4029916AJun 14, 1977
Multi-contact push-button switch and plural embodiment for keyboard switch assembly
NORTHERN ELECTRIC CO89 citations96
US3996429ADec 7, 1976
Multi-contact push-button switch having plural prestressed contact members designed to provide plural circuit simultaneous switching inputs
NORTHERN ELECTRIC CO70 citations91