Assignee
PLESSEY TELECOMM
GB87 patents
Top patents by PatentIndex Score
US5579311ANov 26, 1996
Telecommunications switching
PLESSEY TELECOMM78 citations96
US5544168AAug 6, 1996
ATM switching arrangement
PLESSEY TELECOMM91 citations95
US5271004ADec 14, 1993
Asynchronous transfer mode switching arrangement providing broadcast transmission
PLESSEY TELECOMM80 citations95
US5303303AApr 12, 1994
Data communication system using encrypted data packets
PLESSEY TELECOMM97 citations94
US5703879ADec 30, 1997
ATM switching arrangement
PLESSEY TELECOMM59 citations93
US5682423AOct 28, 1997
Electrical power and telephone ringer signal distribution system
PLESSEY TELECOMM36 citations93
US5303232AApr 12, 1994
High performance asynchronous transfer mode switch
PLESSEY TELECOMM61 citations93
US5793760AAug 11, 1998
Method of multiplexing and a multiplexer
PLESSEY TELECOMM33 citations92
US5459724AOct 17, 1995
ATM switching arrangement
PLESSEY TELECOMM45 citations92
US5109378AApr 28, 1992
Asynchronous time division switch with increased traffic handling capability
PLESSEY TELECOMM36 citations92
US5872645AFeb 16, 1999
Telecommunications network
PLESSEY TELECOMM45 citations91
US5491573AFeb 13, 1996
Optical signal transmission network
PLESSEY TELECOMM81 citations91
US5287513AFeb 15, 1994
Multiplex data ring transmission
PLESSEY TELECOMM28 citations91
US5170391ADec 8, 1992
Fault detection and bandwidth monitoring means for a packet switching arrangement
PLESSEY TELECOMM26 citations91
US5039995AAug 13, 1991
Distributed antenna system
PLESSEY TELECOMM23 citations91
US4995083AFeb 19, 1991
Method of establishing a radio link in one of a plurality of channels between two radio units
PLESSEY TELECOMM68 citations91
US5528406AJun 18, 1996
Telecommunications switching device
PLESSEY TELECOMM44 citations90
US5790552AAug 4, 1998
Statistical gain using ATM signalling
PLESSEY TELECOMM21 citations89
US5204859AApr 20, 1993
Method and apparatus for detecting a frame alignment word in a data system
PLESSEY TELECOMM64 citations89
US5172376ADec 15, 1992
Sdh rejustification
PLESSEY TELECOMM43 citations88
US5069521ADec 3, 1991
Optical transmission apparatus
PLESSEY TELECOMM124 citations88
US5835660ANov 10, 1998
Optical fibre clamping device
PLESSEY TELECOMM32 citations86
US5077729ADec 31, 1991
Testing optical fiber links
PLESSEY TELECOMM33 citations86
US5062518ANov 5, 1991
Coin validation apparatus
PLESSEY TELECOMM34 citations86
US5974027AOct 26, 1999
Telecommunications network including a channel switching protection arrangement
PLESSEY TELECOMM62 citations85
US5668802ASep 16, 1997
High-speed digital subscriber lines
PLESSEY TELECOMM59 citations85
US5416423AMay 16, 1995
Method and apparatus for verifying the integrity of a smart card
PLESSEY TELECOMM55 citations85
US5182780AJan 26, 1993
Optical backplane interconnecting circuit boards
PLESSEY TELECOMM24 citations85
US5103448AApr 7, 1992
Simultaneous ringing control in the time division duplex telecommunications system
PLESSEY TELECOMM34 citations85
US5822419AOct 13, 1998
Telecommunications service interactions
PLESSEY TELECOMM36 citations81
US5734902AMar 31, 1998
Communication system for maintaining data consistency among replicated shared objects
PLESSEY TELECOMM43 citations81
US5694397ADec 2, 1997
Constant bit rate synchronization
PLESSEY TELECOMM28 citations80
US5579314ANov 26, 1996
Connectionless information service delivery
PLESSEY TELECOMM22 citations80
US5475680ADec 12, 1995
Asynchronous time division multiplex switching system
PLESSEY TELECOMM25 citations80
US6009530ADec 28, 1999
Real time clock synchronization in a telecommunications network
PLESSEY TELECOMM17 citations79
US5636260AJun 3, 1997
Telecommunication customer interface
PLESSEY TELECOMM13 citations74
US5504739AApr 2, 1996
Reconfigurable switch memory
PLESSEY TELECOMM9 citations74
US5627824AMay 6, 1997
Telecommunications network
PLESSEY TELECOMM14 citations72
US5283785AFeb 1, 1994
Bus bypassing matrix switch in add-drop multiplexer
PLESSEY TELECOMM18 citations72
US5278849AJan 11, 1994
Method and apparatus for identifying valid data cells in a redundant pair combining unit of an asynchronous transfer mode switch
PLESSEY TELECOMM7 citations72
US5056087AOct 8, 1991
Pcm communication system
PLESSEY TELECOMM19 citations72
US5896378AApr 20, 1999
SDH Add/Drop Multiplexer
PLESSEY TELECOMM12 citations71
US5544172AAug 6, 1996
Method for the digital transmission of data
PLESSEY TELECOMM17 citations71
US5392327AFeb 21, 1995
Termination unit with maintenance facility
PLESSEY TELECOMM10 citations71
US5345496ASep 6, 1994
Remote line test facility
PLESSEY TELECOMM9 citations71
US5633925AMay 27, 1997
Low loss telephone circuit
PLESSEY TELECOMM10 citations70
US4992666AFeb 12, 1991
Measurement of concentricity of core and cladding profiles of an optical fiber preform using fluorescence
PLESSEY TELECOMM14 citations66
US5610928AMar 11, 1997
Data verification method
PLESSEY TELECOMM7 citations65
US5204799AApr 20, 1993
Protective arrangement for telecommunications line interface circuit
PLESSEY TELECOMM16 citations65
US5572574ANov 5, 1996
Cordless telephone registration method
PLESSEY TELECOMM9 citations64
Showing the top 50 of 87 patents by PatentIndex Score.