Assignee
PACIFIC BELL
US42 patents
Top patents by PatentIndex Score
US4742263AMay 3, 1988
Piezoelectric switch
PACIFIC BELL153 citations99
US5216668AJun 1, 1993
Modulated nonblocking parallel banyan network
PACIFIC BELL60 citations96
US5023612AJun 11, 1991
Illegal sequence detection and protection circuit
PACIFIC BELL68 citations96
US4819126AApr 4, 1989
Piezoelectic relay module to be utilized in an appliance or the like
PACIFIC BELL76 citations96
US4807280AFeb 21, 1989
Cross-connect switch
PACIFIC BELL131 citations94
US5132965AJul 21, 1992
Nonblocking parallel banyan network
PACIFIC BELL24 citations93
US5062104AOct 29, 1991
Digital service unit for connecting data processing equipment to a telephone system based computer network
PACIFIC BELL60 citations93
US4916349AApr 10, 1990
Latching piezoelectric relay
PACIFIC BELL40 citations93
US4673246AJun 16, 1987
Patch unit for fiber optic distribution network
PACIFIC BELL82 citations93
US5093600AMar 3, 1992
Piezo-electric relay
PACIFIC BELL25 citations92
US4898648AFeb 6, 1990
Method for providing a strengthened conductive circuit pattern
PACIFIC BELL30 citations92
US5124943AJun 23, 1992
Digital network utilizing telephone lines
PACIFIC BELL35 citations91
US4852154AJul 25, 1989
Pay-per-view CATV system
PACIFIC BELL296 citations91
US4750169AJun 7, 1988
Telephone system and method for transmitting digital information
PACIFIC BELL45 citations91
US4730311AMar 8, 1988
Remote multiplexer for digital telephone system
PACIFIC BELL40 citations91
US5327485AJul 5, 1994
Telephone lottery play system
PACIFIC BELL256 citations90
US5058163AOct 15, 1991
Interface unit for transferring digital data between time-domain multiplexed communication links
PACIFIC BELL22 citations89
US4946244AAug 7, 1990
Fiber optic distribution system and method of using same
PACIFIC BELL27 citations89
US4893340AJan 9, 1990
Multijunction unit apparatus for use in a digital network
PACIFIC BELL35 citations89
US4845736AJul 4, 1989
Cross-connect switch and method for providing test access thereto
PACIFIC BELL45 citations89
US5848144ADec 8, 1998
Switch cutover with paced transition
PACIFIC BELL47 citations82
US5452206ASep 19, 1995
Method for generating documentation for computer software
PACIFIC BELL40 citations82
US5386525AJan 31, 1995
System for providing application programs with direct addressability into a shared dataspace
PACIFIC BELL56 citations82
US4909895AMar 20, 1990
System and method for providing a conductive circuit pattern utilizing thermal oxidation
PACIFIC BELL22 citations82
US4890279ADec 26, 1989
Multiplexer and computer network using the same
PACIFIC BELL22 citations81
US5357556AOct 18, 1994
System and method for telephone network testing
PACIFIC BELL28 citations80
US5065394ANov 12, 1991
Packet routing switch
PACIFIC BELL12 citations74
US4907253AMar 6, 1990
Cross-connected switch having means for removing switching modules without interrupting service
PACIFIC BELL17 citations74
US4738869AApr 19, 1988
Photoselective electroless plating method employing UV-absorbing substrates
PACIFIC BELL12 citations74
US4795917AJan 3, 1989
Low power high voltage driver circuit
PACIFIC BELL11 citations73
US4716562ADec 29, 1987
Telephone system
PACIFIC BELL12 citations72
US4871225AOct 3, 1989
Fiber optic distribution network
PACIFIC BELL12 citations70
US4811332AMar 7, 1989
Apparatus and method for TDM data switching
PACIFIC BELL7 citations70
US4696063ASep 22, 1987
Optical fiber bandwidth limiting method
PACIFIC BELL11 citations70
US4924460AMay 8, 1990
Office control unit apparatus for use in a digital network
PACIFIC BELL14 citations67
US4860334AAug 22, 1989
System for detecting and locating defective crosspoint switches
PACIFIC BELL3 citations63
US4899340AFeb 6, 1990
Error correcting code and error correcting circuit using the same
PACIFIC BELL6 citations61
US4868620ASep 19, 1989
High-voltage pull-up device
PACIFIC BELL6 citations59
US4748661AMay 31, 1988
Circuit for translating telephone numbers
PACIFIC BELL15 citations59
US4706241ANov 10, 1987
Low speed gate circuit
PACIFIC BELL2 citations59
US4611100ASep 9, 1986
Bunching block for McCulloh circuits and method of operation
PACIFIC BELL1 citations49
US5216853AJun 8, 1993
Telephone enclosure
PACIFIC BELL6 citations46