Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Reverse billing of internet telephone calls

Reverse billing of internet telephone calls

US Patent 6636504 · Granted Oct 21, 2003

Estimated economic value: $116,302,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Hybrid electric variable speed drive2021
Electric all-wheel drive two speed with split double reduction planetary2019
Electric all-wheel drive two speed with split double reduction planetary2018
Motor driven transfer case with modular actuation2018
Middle ear implant2017
Network session management for telephony over hybrid networks2015
Electro-mechanical transfer case with range shift on the move2015
Smart antenna systems for reception of digital television signals2015
Network session management for telephony over hybrid networks2015
Smart antenna systems suitable for reception of digital television signals2014
Secure and reliable policy enforcement2013
Brassiere strap2012