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Stephen P. Caldwell
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Columbia, MD, US
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Patents Grants
last 30 patents
Information
Patent Grant
Radar exciter including phase compensation of the waveform generator
Patent number
7,570,201
Issue date
Aug 4, 2009
Northrop Grumman Corporation
Grant H. Watkins
G01 - MEASURING TESTING
Information
Patent Grant
Multi-mode radar exciter
Patent number
6,081,226
Issue date
Jun 27, 2000
Northrop Grumman Corporation
Stephen P. Caldwell
G01 - MEASURING TESTING
Information
Patent Grant
High-power waveform generator
Patent number
5,854,604
Issue date
Dec 29, 1998
Northrop Grumman Corporation
John Xavier Przybysz
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for cancelling phase noise
Patent number
5,661,439
Issue date
Aug 26, 1997
Northrop Grumman Corporation
Grant H. Watkins
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Wide band radio-frequency converter having multiple use of intermed...
Patent number
5,548,839
Issue date
Aug 20, 1996
Stephen P. Caldwell
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Radar and other communication systems having large bandwidth and la...
Patent number
5,467,091
Issue date
Nov 14, 1995
Westinghouse Electric Corp.
Grant H. Watkins
G01 - MEASURING TESTING
Information
Patent Grant
Direct digital FM waveform generator for radar systems
Patent number
5,151,661
Issue date
Sep 29, 1992
Westinghouse Electric Corp.
Stephen P. Caldwell
G01 - MEASURING TESTING
Information
Patent Grant
Voltage-controlled oscillator with rapid tuning loop and method for...
Patent number
5,023,572
Issue date
Jun 11, 1991
Westinghouse Electric Corp.
Stephen P. Caldwell
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Wide-band phase locked loop amplifier apparatus
Patent number
4,639,688
Issue date
Jan 27, 1987
The United States of America as represented by the Secretary of the Air Force
Francis W. Hopwood
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Phase lock acquisition system having FLL for coarse tuning and PLL...
Patent number
4,580,107
Issue date
Apr 1, 1986
The United States of America as represented by the Secretary of the Air Force
Stephen P. Caldwell
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Narrow pulsewidth pulse generator circuit utilizing NPN microwave t...
Patent number
4,546,268
Issue date
Oct 8, 1985
The United States of America as represented by the Secretary of the Air Force
Stephen P. Caldwell
H03 - BASIC ELECTRONIC CIRCUITRY