Inventor
WALKER HOPETON
US25 patents
⚠️ This page may combine multiple inventors who share the name “WALKER HOPETON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
AT & T CORP
20 patentsUS7289489B1Oct 30, 2007
Method for billing IP broadband subscribers
AT & T CORP345 citations99
US6889321B1May 3, 2005
Protected IP telephony calls using encryption
AT & T CORP253 citations99
US6826173B1Nov 30, 2004
Enhanced subscriber IP alerting
AT & T CORP469 citations99
US6816469B1Nov 9, 2004
IP conference call waiting
AT & T CORP275 citations99
US6775267B1Aug 10, 2004
Method for billing IP broadband subscribers
AT & T CORP572 citations99
US6775273B1Aug 10, 2004
Simplified IP service control
AT & T CORP166 citations99
US6680935B1Jan 20, 2004
Anonymous call rejection
AT & T CORP200 citations99
US6252952B1Jun 26, 2001
Personal user network (closed user network) PUN/CUN
AT & T CORP506 citations99
US7075918B1Jul 11, 2006
BRG with PBX capabilities
AT & T CORP84 citations98
US6738615B1May 18, 2004
Wireless centrex caller ID
AT & T CORP73 citations98
US6728239B1Apr 27, 2004
Scaleable network server for low cost PBX
AT & T CORP88 citations98
US6633635B2Oct 14, 2003
Multiple call waiting in a packetized communication system
AT & T CORP135 citations98
US6574470B1Jun 3, 2003
Programmable ring-call forwarding in a wireless centrex services system
AT & T CORP149 citations98
US6836478B1Dec 28, 2004
Call hold with reminder and information push
AT & T CORP58 citations96
US6587683B1Jul 1, 2003
Unconditional call forwarding in a wireless centrex services system
AT & T CORP68 citations96
US6785560B1Aug 31, 2004
Speed calling in a wireless centrex system
AT & T CORP49 citations93
US6745025B1Jun 1, 2004
Time-of-day call forwarding in a wireless centrex services system
AT & T CORP55 citations93
US6631258B1Oct 7, 2003
Busy call forwarding in a wireless centrex services system
AT & T CORP33 citations93
US6618600B1Sep 9, 2003
Distinctive ringing in a wireless centrex system
AT & T CORP51 citations93
US6606505B1Aug 12, 2003
Wireless centrex call screen
AT & T CORP25 citations93