Paul R Mahoney, 759 Bates Ln, Graniteville, MA 01886

6360369, Mar 19, 2002

Feb 18, 1999

09/252343

Paul F. Mahoney - Hull MA, 02043

H04N 7173

725111, 725125, 375232, 375350

A system for the removing of interference (ingress) in cable modems without reducing the data rate or changing the frequency of the signal. The invention comprises both, a variable band stop filter bank, and a non-linear equalization system. The band stop filter bank removes ingress while the equalization system, comprising of an inner and an outer equalizer, removes the distortion created by the band stop filtering. A spectrum monitor detects both the presence of ingress and its frequency, then feeds the data to a digital signal processor which calculates the distortion removal settings for the equalizers. No additional hardware of software is required in the users homes, but rather the invention is designed to be used solely at the head end and in addition to the basic Cable Modem Termination System.

4352029, Sep 28, 1982

Dec 13, 1979

6/103347

Paul F. Mahoney - Brighton MA
Jerrold L. Bonn - Waltham MA

Signatron, Inc. - Lexington MA

H03K 326
G06G 716

307317R

Signal processing circuitry, preferably for use in multiplying two input signals, one at RF frequency and one at base-band frequency, which includes a pair of PIN diodes connected in a generally symmetrical circuit configuration using a single bias supply and including a trimming resistor for controlling the current through a selected one of the diodes so that the characteristics of both diodes can be matched over substantially the complete range of control current values therefor. Further, the circuit configuration permits the use of an easy and effective technique for compensating for temperature changes of the circuit during operation.

4805189, Feb 14, 1989

Feb 13, 1986

6/829295

Paul F. Mahoney - Brighton MA

Signatron, Inc. - Lexington MA

H04B 346
H04B 1700

375 10

A signal processing system for measuring the amplitude and time delay responses of a network over the bandwidth allocated to the network wherein a plurality of subburst signals each in the form of a suppressed-carrier, amplitude-modulated signal, is applied to the network. The signals received from the network are provided in complex form having in-phase and quadrature components. Matched filters respond to such components and the matched filter outputs are processed so as to determine the estimated amplitude and time delay responses of the network at the carrier frequency of the subburst signals over the operating bandwidth of the network.

D368942, Apr 16, 1996

Jan 24, 1995

D/033958

Paul J. Mahoney - Norwood MA

D21201

4281411, Jul 28, 1981

Jun 25, 1979

6/051722

Jerrold L. Bonn - Waltham MA
Paul F. Mahoney - Brighton MA
Peter Monsen - Stow MA

Signatron, Inc. - Lexington MA

H04B 708

375 14

An improved high speed digital communications diversity receiver using a forward adaptive transversal filter equalizer, having a plurality of weighting sections in each diversity channel to provide a combined weighting signal, wherein the required complex multiplications and correlations needed for weighting purposes are performed at IF frequencies, while the time-delayed combining operations for providing the desired combined weighted output signal are performed at baseband frequencies. Such an arrangement reduces the number of tapped delay lines normally needed for such transversal filter equalizer operation and further reduces the signal losses incurred in operating delay line devices at intermediate frequencies so that fewer large gain-bandwidth product amplifiers are required in the system than the number required in previously available systems using such forward transversal filter equalizers.

5609339, Mar 11, 1997

Jul 17, 1996

8/683753

Paul C. Mahoney - Wellesley MA

A63F 300

273255

A board game for two or more participants comprises a game board overlaid with a grid pattern to define a plurality of sections. Certain sections on the game board are uniquely identified to designate a docking bay and an entering square for each of four participants. Certain sections on the game board are also uniquely identified to designate asteroids. Each participant receives initially a set of game pieces, each set of game pieces including five spaceships and ten bombs. At a maximum, two bombs are mountable onto an associated ship. The board game also comprises a set of dice for indicating the amount of movement of a ship on prescribed sections of the game board. The board game further comprises a manually operable stop watch for indicating a time interval related to the amount of movement on the game board of a bomb from the ship on which the bomb is mounted toward a ship of an opponent. The object of the game is to be the participant who has the last remaining spaceship on the game board. Spaceships are either removed from the game board by shooting down an opponent's spaceship with a bomb or by crashing a spaceship into an asteroid or docking bay.

4851853, Jul 25, 1989

Feb 5, 1988

7/154484

Paul F. Mahoney - Brighton MA

Signatron, Inc. - Lexington MA

G01S 728
G01S 740

342174

This invention relates generally to signal processing techniques for removing or reducing the effects of instabilities in pulsed signal sources, as in phase echo systems using a pulsed signal transmitter source, and, more particularly, to a technique for compensating for the varying amplitude, frequency and/or phase characteristics of the signal source pulses during operation.

4418319, Nov 29, 1983

Jul 7, 1982

6/396047

Paul F. Mahoney - Brighton MA
Jerrold L. Bonn - Waltham MA

Signatron, Inc. - Lexington MA

H03K 326
G06G 716

328160

Signal processing circuitry, preferably for use in multiplying two input signals, one at RF frequency and one at baseband frequency, which includes at least a basic four branch bridge circuit having a diode connected in each branch in a generally symmetrical four branch circuit configuration using a single bias supply and including a trimming resistor in at least one branch for controlling the current through the diodes in such branch so that the characteristics of the diodes in all branches can be matched over substantially the complete range of control current values therefor.