Resources Contact Us Home
Roberts; James L.
Seattle, WA
No. of patents:

Patent Number Title Of Patent Date Issued
5200931 Volumetric and terrain imaging sonar April 6, 1993
A method and apparatus for the generation of a three-dimensional image representing structures detected within a volume. Two dimensional differential phase measurements are made on backscatter signals. Azimuth, elevation and range are calculated over a statistically large number of s
4972441 Enhanced pulse time-of-arrival detector November 20, 1990
A detector for detecting a communication pulse in the presence of noise is disclosed having a transmitter for transmitting a communication pulse of carrier frequency having a main pulse portion and a pre-pulse portion, the pre-pulse portion being of substantially opposite phase to the ma
4071821 Quadrature correlation phase determining apparatus January 31, 1978
Digital apparatus and a method are disclosed for determining the phase angle of a tone signal of known frequency by correlating a clipped version of the tone signal with a reference signal having a repetition rate equal to the tone frequency. Correlation is accomplished by multiplying th
4038540 Quadrature correlation pulse detector July 26, 1977
Digital apparatus and a method are disclosed for detecting a tone pulse of known carrier frequency in a signal in which random noise is present by correlating a clipped version of the input signal with a square wave reference signal having a repetition rate equal to the carrier frequency
4004235 Phase-locking midpulse detector January 18, 1977
Apparatus, in a receiver, for detecting the mid-pulse phase reversal of an nput signal s(t) = a(t).sub.BLT cos (.omega..sub.c t + .theta.). The signal a(t).sub.BLT is a modulating signal a(t), having a phase-reversal at its midpoint, after band-limiting by a transmitter, and cos (.omega..

  Recently Added Patents
Lid for a container
Rear bumper for an automobile
Methods for enhancing tantalum filament life in hot wire chemical vapor deposition processes
Formwork release composition and use thereof
Requirements model comparative analysis method for effort estimation in customizing a network monitoring and control system
Solid-state imaging apparatus and imaging system
Universal tablet and smartphone holder
  Randomly Featured Patents
Composite roofing product and method and apparatus for making a composite roofing product
Liquid crystal display and substrate thereof
Medical pressure gauge and indicator device
Construction toy
Method and apparatus for reducing cross-luminance in an image display device
System and method for establishing and enforcing service rules in a service provider network
Heteroaryl amines as novel acetylcholinesterase inhibitors
Remote control
Method and apparatus for monitoring discharge of a battery device based on battery self-discharge and discharge over time