Assignee
BELL CANADA
CA30 patents
Top patents by PatentIndex Score
US5390278AFeb 14, 1995
Phoneme based speech recognition
BELL CANADA209 citations96
US6940973B1Sep 6, 2005
Method and apparatus for cancelling common mode noise occurring in communications channels
BELL CANADA100 citations95
US6236722B1May 22, 2001
Method and system for using TCAP signaling for improved call setup from a virtual switching point
BELL CANADA92 citations95
US5881132AMar 9, 1999
Method and apparatus for monitoring selected telecommunications sessions in an intelligent switched telephone network
BELL CANADA97 citations95
US5479488ADec 26, 1995
Method and apparatus for automation of directory assistance using speech recognition
BELL CANADA416 citations95
US6584179B1Jun 24, 2003
Method and apparatus for improving the utility of speech recognition
BELL CANADA63 citations94
US6226289B1May 1, 2001
Method and apparatus for dynamically routing calls in an intelligent network
BELL CANADA123 citations94
US6097804AAug 1, 2000
Method and system for completing a voice connection between first and second voice terminals in a switched telephone network
BELL CANADA212 citations94
US5179420AJan 12, 1993
Optical time domain reflectometer using a tunable optical source
BELL CANADA83 citations93
US6735293B2May 11, 2004
Method and system for facilitating telecommunications service provisioning and service assurance
BELL CANADA91 citations92
US6546057B1Apr 8, 2003
Suppression of radio frequency interference and impulse noise in communications channels
BELL CANADA50 citations92
US6111946AAug 29, 2000
Method and system for providing answer supervision in a switched telephone network
BELL CANADA36 citations92
US6476749B1Nov 5, 2002
High speed analog-to-digital converter and digital-to-analog converter
BELL CANADA76 citations91
US6456657B1Sep 24, 2002
Frequency division multiplexed transmission of sub-band signals
BELL CANADA78 citations91
USD288441SFeb 24, 1987
Tubular telephone unit
BELL CANADA71 citations91
US6687350B1Feb 3, 2004
Smart card reader and transaction system
BELL CANADA56 citations90
US6959056B2Oct 25, 2005
RFI canceller using narrowband and wideband noise estimators
BELL CANADA53 citations89
US5698829ADec 16, 1997
Photodegradation of toxic contaminants
BELL CANADA23 citations89
US6961415B2Nov 1, 2005
Method and system for facilitating telecommunications service provisioning and service assurance
BELL CANADA24 citations86
US5933481AAug 3, 1999
Method of controlling call traffic in a telecommunication system
BELL CANADA45 citations86
US5719930AFeb 17, 1998
Method of volume screening signalling messages in a telecommunication system
BELL CANADA19 citations83
US4567115AJan 28, 1986
Pressure impregnation of wood poles for preservation
BELL CANADA22 citations82
US6493444B2Dec 10, 2002
Enhanced application telephone network
BELL CANADA10 citations74
US4847002AJul 11, 1989
Improved stabilization of wood preservative solutions and preservation of wood by such solutions
BELL CANADA15 citations66
US6456701B1Sep 24, 2002
Network-centric control of access to transceivers
BELL CANADA6 citations63
USD356565SMar 21, 1995
Telephone kiosk
BELL CANADA2 citations58
USD293639SJan 12, 1988
Wall mounted shelf and telephone unit
BELL CANADA5 citations58
USD290043SMay 26, 1987
Telephone booth
BELL CANADA2 citations58
US4918885AApr 24, 1990
Method and apparatus for inhibiting ice mass formation
BELL CANADA1 citations49
USD473521SApr 22, 2003
Connector cable for computer to vehicle universal data bus (UDB) port
BELL CANADA5 citations46