The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 04, 1998
Filed:
Dec. 04, 1995
John W Seazholtz, Great Falls, VA (US);
Robert D Farris, Sterling, VA (US);
Bell Atlantic Network Services, Inc., Arlington, VA (US);
Abstract
A cellular telephone system is upgraded by modifying subscriber units for selective service provider acquisition during roaming. Priority of acquisition is given to those service providers associated with the home service provider. These preferred service providers are identified by system identification (SIDs) numbers. A roaming subscriber unit will tune to a single beacon frequency identifying cellular digital packet data (CDPD) frequencies from which the subscriber unit will select one CDPD frequency corresponding to a service provider operating in the geographic area to which the subscriber has roamed.