David Marlin Bills, 54169 Tollerton Ave, Jacksonville, FL 32259

7002511, Feb 21, 2006

Mar 2, 2005

11/070483

Danny F. Ammar - Windermere FL, US
David M. Bills - Orlando FL, US
Gavin Clark - Tavares FL, US
Matt H. Shafie - Casselberry FL, US

Xytrans, Inc. - Orlando FL

G01S 7/28
G01S 13/10
G01S 7/40

342134, 342 82, 342 89, 342118, 342128, 342130, 342131, 342132, 342165, 342173, 342174, 342175, 342194, 342195, 342196

A millimeter wave pulsed radar system includes a radar synthesizer having a voltage controlled oscillator/phase locked loop (VCO/PLL) circuit, direct digital synthesizer (DDS) circuit and quadrature modulator circuit that are operative to generate an intermediate frequency local oscillator signal (IF/LO signal). A radar transceiver is operative with the radar synthesizer for receiving the IF/LO signal. A transmitter section has a frequency multiplier that multiplies the IF/LO signal up to a millimeter wave (MMW) radar signal and a receiver section and includes a direct conversion mixer that receives a MMW radar signal and the IF/LO signal to produce I/Q baseband signals that are later digitized and processed.

7221141, May 22, 2007

Jul 7, 2005

11/176467

David M. Bills - Orlando FL, US

Xytrans, Inc. - Orlando FL

G01R 23/04

324 95

A system for measuring radiant signals includes a detector circuit for detecting a time multiplexed, measured radiant signal and reference signal. A switch is connected to the detector circuit for receiving signals from the detector circuit. A measured signal sampling circuit, a reference signal sampling circuit, a measured alias circuit and a reference alias circuit are connected to the switch, which is operative for switching among the sampling and alias circuits to remove sampling noise and improve switching latency.

2005012, Jun 9, 2005

Dec 6, 2004

11/005626

Danny Ammar - Windermere FL, US
David Bills - Orlando FL, US

H04H001/00

455183200, 455259000

This present invention includes an indoor unit (IDU) and compact outdoor unit (ODU) having an intermediate frequency/modem circuit, millimeter wave transceiver circuit, and digital interface between the IDU and the ODU capable of up to about 100 MBps data rate over at least about a 300 meter cable. The system uses a conversion to the polar coordinate system completes calculations in the polar coordinate system, reducing the computational requirements, and therefore, the size and cost of the system.

5423433, Jun 13, 1995

May 6, 1994

8/239325

Robert G. Arnold - Tulsa OK
David M. Bills - Tulsa OK

Osborn Engineering, Inc. - Tulsa OK

B03C 118

209636

A material separator apparatus having a continuous conveyor belt for support and transportation of materials to be separated and a motor to rotate the conveyor belt. The apparatus includes an electromagnet within the continuous belt to produce a magnetic field at the belt. An alternating current drives the electromagnet. This produces a magnetic field which in turn induces an eddy current in the materials to be separated. The eddy currents form the basis of a repulsive force which will produce different material trajectories based on the material properties such as conductivity and permeability. The wave form of the driving current is controlled to improve repulsive efficiency and help assist in differentiating among several classes of materials.