This application is related to the following three issued patents and one co-pending patent application which are assigned to the same assignee as the present application: (1) “Position Locating and Communication System Using Multiple Satellite Constellations”, U.S. Pat. No. 5,619,211; (2) “Position-Aided Subscriber Unit for a Satellite Cellular System”, U.S. Pat. No. 5,119,504; (3) “Satellite-Based Geolocation Calibration System and Method”, U.S. Pat. No. 5,617,101; and (4) “Method and Apparatus for Provicling Duplex Communication Service in Geographical Areas Where Conventional Services Are Obstructed”,U.S. Ser. No. 08/672,171.
Number | Name | Date | Kind |
---|---|---|---|
5119504 | Durboraw, III | Jun 1992 | |
5594454 | Devereux et al. | Jan 1997 | |
5617101 | Maine et al. | Apr 1997 | |
5619211 | Horkin et al. | Apr 1997 | |
5809397 | Harthcock et al. | Sep 1998 | |
5844521 | Stephens et al. | Dec 1998 | |
5966403 | Pon | Oct 1999 | |
5969670 | Kalafus et al. | Oct 1999 | |
5982819 | Womack et al. | Nov 1999 | |
5990825 | Ito | Nov 1999 | |
5991279 | Haugli et al. | Nov 1999 | |
5999561 | Naden et al. | Dec 1999 | |
6018313 | Engelmayer et al. | Jan 2000 | |
6041222 | Horton et al. | Mar 2000 | |
6097974 | Camp, Jr. et al. | Aug 2000 | |
6104978 | Harrison et al. | Aug 2000 | |
6111541 | Karmel | Aug 2000 | |
6124825 | Eschenbach | Sep 2000 |