Robert J Crow

US Patent:

6643509, Nov 4, 2003

Filed:

Mar 10, 2000

Appl. No.:

09/522787

Inventors:

Robert Palmer Crow - Colorado Springs CO 80906

International Classification:

H04Q 720

US Classification:

455431, 455427

Abstract:

A civil aviation communication system has a satellite subsystem including a constellation of satellites. A ground subsystem communicates with the satellite subsystem. The ground subsystem includes a number of networked ground stations at selected locations. An airborne communication subsystem is included in the aircraft. The airborne subsystem transmits to the satellite subsystem in a first frequency band. The airborne subsystem receives transmissions from the satellite subsystem in a second frequency band. The airborne subsystem communicates with a ground based system in a third frequency band. The third frequency band is between the first frequency band and the second frequency band.

US Patent:

56573936, Aug 12, 1997

Filed:

Jul 30, 1993

Appl. No.:

8/099437

Inventors:

Robert P. Crow - Colorado Springs CO

International Classification:

H04R 300

US Classification:

381 92

Abstract:

A sound enhancement system including a beamed linear array microphone system for the acoustic pickup of voice and music from substantial distances with a relatively narrow sound pickup beam and with the avoidance of acoustic feedback. The acceptance beam angle is relatively constant over the desired sound octaves. Response outside of the acceptance beam is relatively low. The system includes a microprocessor-controlled circuit for processing the signals from a multiplicity of microphone elements in the linear array for application to a loudspeaker.

US Patent:

56275463, May 6, 1997

Filed:

Sep 5, 1995

Appl. No.:

8/523348

Inventors:

Robert P. Crow - Colorado Springs CO

International Classification:

H04B 7185

US Classification:

342352

Abstract:

The present invention provides a combined ground and satellite system for global aircraft surveillance, navigation, landing guidance and collision avoidance which comprises a satellite subsystem consisting of both a satellite constellation and associated ground stations, and a ground subsystem consisting of a network of ground stations, together with an airborne subsystem comprised of a transponder unit located in each of the aircraft using the system. A high speed two-way data link is provided between each of the subsystems using spread spectrum technology to permit overlaying and operation of the system in an existing band of narrow channels with minimum mutual interference. The system of the invention is reliable because of the redundant subsystems, and is not subject to failure. Also, the system provides for computations to be made on the ground, rather than in the aircraft, thereby reducing the size and complexity of the airborne equipment. The system also achieves a high degree of precision, as compared with the prior art systems.