JONATHAN COHEN, P.A.-C.
Physician Assistant at Eastern Ave, Baltimore, MD

6515666, Feb 4, 2003

Jul 17, 2001

09/682078

Jonathan Drew Cohen - Hanover MD 21076

G06T 1140

345440

A method of constructing graph abstractions using a computer is described. The abstraction is presented on a computer display and used by a human viewer to understand a more complicated set of raw graphs. The method provides rapid generation of an abstraction that offers an arbitrary composition graph of vertices into composite vertices, dispersing and marshaling of composite vertices, arbitrary hiding and showing of portions of the composition, and marking of points of elision.

6311183, Oct 30, 2001

Jul 14, 1999

9/353235

Jonathan Drew Cohen - Hanover MD

The United States of America as represented by the Director of National
Security Agency - Washington DC

G06F 1730

707 6

A method of full-text scanning for matches in a large dictionary of keywords is described, suitable for SDI (selective dissemination of information). The method is applicable to large dictionaries (hundreds of thousands of entries) and to arbitrary byte sequences for both patterns and sample streams. The approach employs Boyer-Moore-Horspool skipping, extended to pattern collections and digrams, followed by an n-gram hash test, which also identifies a subset of feasible keywords for conventional pattern matching at each location of a putative match.

5245408, Sep 14, 1993

Jan 11, 1991

7/647624

Jonathan D. Cohen - Hanover MD

The United States of America as represented by the Director, National
Security Agency - Washington DC

G01B 902

356351

An apparatus is described which detects the presence or absence of coherent light and provides an estimate of the coherent light's wavelength. The apparatus employs a common-path "polarization interferometer" in which the two linear polarization paths act as interferometer legs. Electro-optic modulation is used to effect periodic differential path length changes in the interferometer. The apparatus performs synchronous time-integrating detection on the light emerging from the interferometer to measure coherent contributions in the presence of obscuring incoherent light.

4755745, Jul 5, 1988

Mar 4, 1986

6/845673

Jonathan D. Cohen - Hanover MD

The United States of America as represented by the Director, National
Security Agency - Fort George G. Meade MD

G01R 2316

324 77K

An apparatus is described which performs acoustooptical signal processing functions with incoherent light, which procedures were formerly possible only with coherent light devices. Specific embodiments include an optical excisor, i. e. , a programmable filter; a multichannel radiometer, i. e. , an apparatus which estimates the power spectrum of a signal accompanied by noise; and an ambiguity processor, i. e. , a time versus frequency cross correlator.

4818949, Apr 4, 1989

Jan 6, 1988

7/142114

Jonathan D. Cohen - Hanover MD

U.S. Government as represented by Director, National Security Agency - Fort George G. Meade MD

G01R 2316

324 77B

An apparatus is described which performs real time spectrum analysis of large bandwidth radio frequency signals. The apparatus allows the simultaneous monitoring of all frequencies within the band of interest, and operates in the presence of multiple frequencies.