| 6980799 |
Method for preserving calls when service is interrupted to a mobile unit in a wireless communication system |
Akhtar Akhteruzzaman, Paul Sand, Claudis Young |
2005-12-27 |
| 6823189 |
System and method for identifying mobile communication apparatuses proximal with an identification locus |
Akhter Akhteruzzaman, Paul Sand |
2004-11-23 |
| 6701156 |
System and method for managing response to a need at a site |
Akhter Akhteruzzaman, Paul Sand |
2004-03-02 |
| 6584316 |
Handoff of phone calls from wireless to wireline network |
Akhtar Akhteruzzaman, Paul Sand |
2003-06-24 |
| 6580787 |
Integration of voice mail, email, fax and personal calendar systems to automatically update messages |
Akhtar Akhteruzzaman, Richard Brockman, Paul Sand, Phillip Michael Sands |
2003-06-17 |
| 6405042 |
Provision of cellular/wire-line service |
Akhtar Akhteruzzaman, Paul Sand |
2002-06-11 |
| 6386803 |
Drill for inexperienced users |
Paul E. Maass |
2002-05-14 |
| 6026076 |
Detecting digital multiplexer faults |
Kenneth Habegger, Karen Louise Moeller, Ronald Keith Poole, Jaime E. Salazar, Mark Roman Sosinski |
2000-02-15 |
| 4379210 |
Ringing detector for use by the deaf |
— |
1983-04-05 |
| 4331913 |
Precision negative impedance circuit with calibration |
— |
1982-05-25 |
| 4283675 |
Impedance/admittance measuring circuit |
— |
1981-08-11 |
| 4224483 |
Electronic loaded/nonloaded telephone loop identification circuit |
James L. Neigh |
1980-09-23 |
| 4197429 |
Gain-adjusting conference circuit |
— |
1980-04-08 |