Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Apparatus and method for virtual private telephone line with automatic ring down

Apparatus and method for virtual private telephone line with automatic ring down

US Patent 5577113 · Granted Nov 19, 1996

Estimated economic value: $23,916,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Real-time object detection using depth sensors2023
Occupancy sensing system for custodial services management2022
Measuring people-flow through doorways using easy-to-install IR array sensors2021
Telecommunications system having separate switch intelligence and switch fabric2012
Method and apparatus of processing a call in a telecommunications network2001
Telecommunications system having separate switch intelligence and switch fabric2000
Apparatus and method for virtual private telephone line with automatic ring down1996
Apparatus and method for virtual private telephone line with automatic ring down1996
Apparatus and method for virtual private telephone line with automatic ring down1996