Patent Number: US 5406593 A
Filing Date: 1993-08-20
Publication Date: 1995-04-11
Status: Expired – Lifetime
Current Assignee: BlackBerry Ltd, Ericsson Inc / General Electric Co
Applicants: General Electric Co.
IPC/CPC Classifications: H04B7/08;;H04L1/20
Patent Attorney
Lawrence P. Zale