| 8688128 |
Method and system for providing toll-free telematic and mobile services applications |
— |
2014-04-01 |
| 8019686 |
Method and system for allowing simultaneous usage of prepaid services |
Charles David Caldwell, Walter H. Hawkins, Robert Sayko, Blake Lane Wattenbarger |
2011-09-13 |
| 7873151 |
User-controlled personalized announcements for account-based services |
— |
2011-01-18 |
| 7627529 |
Method and system for allowing simultaneous usage of prepaid services |
Charles David Caldwell, Walter H. Hawkins, Robert Sayko, Blake Lane Wattenbarger |
2009-12-01 |
| 7519571 |
System and method for transmitting data via data networks with data conversion by a COM automatic marshaller |
Roland Heymann, Heinz-Christoph Schmolka, Marcus Sebald, Thomas Talanis, Frank Volkmann |
2009-04-14 |
| 7302485 |
System and method for transmitting OPC data via data networks, in particular the internet, using an asynchronous data connection |
Roland Heymann, Heinz-Christoph Schmolka, Marcus Sebald, Thomas Talanis, Frank Volkmann |
2007-11-27 |
| 7254222 |
Method and apparatus for implementing a pre-paid card service |
Christopher P. Gilboy, Stephen Shinners |
2007-08-07 |
| 6430285 |
Method and apparatus for an automated caller interaction system |
Cory Gimourginas, Gary Munson |
2002-08-06 |
| 6385311 |
Real-time usage-based spontaneous subscription service |
Christopher P. Gilboy |
2002-05-07 |
| 6310946 |
Method for interrupting a telephone call after receiving a busy signal |
Elroy P. Cartwright, Walter C. Taylor |
2001-10-30 |
| 6169796 |
Call rerouter method and apparatus |
Duane O. Bowker, Christopher P. Gilboy |
2001-01-02 |
| 6061436 |
Telephone billing system |
Christopher P. Gilboy |
2000-05-09 |
| 6026151 |
Network based determination of cost effective access |
Christopher P. Gilboy |
2000-02-15 |
| 5859900 |
Universal call access with reverse billing |
Christopher P. Gilboy |
1999-01-12 |
| 5056134 |
Audible logo for identifying a common carrier |
Thomas A. Dunn, Christina M. Gurke, John W. Hopkins, Richard D. Nafziger |
1991-10-08 |
| 4930154 |
Audible logo for identifying a common carrier |
Thomas A. Dunn, Christina M. Gurke, John W. Hopkins, Richard D. Nafziger |
1990-05-29 |
| 4899375 |
More efficient call handling for operator assistance calls |
Richard W. Hemmeter, Robert Petrelli, Richard J. Piereth, Cyrenus M. Rubald |
1990-02-06 |
| 4776004 |
Communication services method and apparatus |
Thomas A. Dunn, Ross Richardson, Chun P. Tam |
1988-10-04 |