Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Voice enhanced phone card

Voice enhanced phone card

US Patent 6233316 · Granted May 15, 2001

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Temperature measuring method2020
Boiler unit2017
Fuel cell stack flow hood2014
System, method, and device for providing secure operating environments for compu2012
Fuel cell heat exchange systems and methods2011
Device, system, and method for capturing email borne viruses2006
Method and device for securely communicating information via a DSL network2006
Secure messaging communication system2006
Method, device, and network for providing secure communication environments2005
Method and apparatus for performing speaker verification based on speaker indepe2005
Secure voice communication system2005
Method and system for providing fiber optic cable to end users2003