Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method for implementing wide area Centrex

Method for implementing wide area Centrex

US Patent 7609831 · Granted Oct 27, 2009

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Electronic shelf label positioning system and method, electronic shelf label and2024
Picture control method, terminal, and video conferencing apparatus2016
Method of cluster management of network devices and apparatus thereof2011
Method for a calling party to reinitiate a call in card number service2009
Method for a calling party to reinitiate a call in card number service2009