Patent Number: US 5371471 A
Filing Date: 1993-10-29
Publication Date: 1994-12-06
Status: Expired – Lifetime
Current Assignee: BlackBerry Ltd, Ericsson Inc / General Electric Co
Applicants: General Electric Co.
IPC/CPC Classifications: H04L25/02;;H04L25/03
Patent Attorney
Lawrence P. Zale