Richard H Sweet

US Patent:

50015583, Mar 19, 1991

Filed:

Jun 11, 1985

Appl. No.:

6/743418

Inventors:

Harvey A. Burley - W. Bloomfield MI
Richard J. Sweet - Huntington Woods MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

H04N 5333

US Classification:

358113

Abstract:

An infrared imager and a color TV camera view the same scene and the output signals are mixed and fed to a color television monitor so that the scene at night is visible in a black and white format with warm objects appearing dark, and bright colors such as lights appear in natural color superimposed on the black and white image.

US Patent:

57178305, Feb 10, 1998

Filed:

May 29, 1996

Appl. No.:

8/657479

Inventors:

C. Edward Sigler - Reston VA
Richard S. Sweet - Reston VA

Assignee:

AMSC Subsidiary Corporation - Reston VA

International Classification:

H04B 7185

US Classification:

455426

Abstract:

In a mobile communication system, a system for providing communication between multiple users in a closed user group arrangement includes first and second mobile earth terminals (METs) registering with the mobile satellite system. The first MET selects a closed user group network identifier (NET ID) representing a NET group to establish voice communication therewith and transmits the NET ID to a central controller. The central controller receives the NET ID from the first MET, validates the first MET for communication, validates the NET ID, allocates a frequency for the NET group, and broadcasts the message to the NET group informing the NET group of the allocated frequency. The second MET tunes to the frequency in response, to the message broadcast by the central controller. The closed user group arrangement provides security measures to ensure only authorized METs gain access to the NET group, dual standby mode of operation, and priority default operation.