David Durst, 99New York, NY

7089420, Aug 8, 2006

May 24, 2000

09/577961

David I. Durst - Syosset NY, US
Norman Kaish - Whitestone NY, US
Jay Fraser - Merrick NY, US

Tracer Detection Technology Corp. - Syosset NY

G09C 5/00
H04L 9/32

713176, 713170, 713179, 380 51, 380 54, 907 7, 283 72, 283 73, 283 90

The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.

7162035, Jan 9, 2007

May 24, 2000

09/577959

David I. Durst - Syosset NY, US
Norman Kaish - Whitestone NY, US
Jay Fraser - Merrick NY, US
Michael Hoffberg - Bear DE, US
Brian Rodricks - Newark DE, US

Tracer Detection Technology Corp. - Syosset NY

G09C 3/00
H04L 9/00

380 54, 713170, 713176

The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.

7773749, Aug 10, 2010

Jan 9, 2007

11/621252

David I. Durst - Syosset NY, US
Norman Kaish - Whitestone NY, US
Jay Fraser - Freeport NY, US
Michael Hoffberg - Bear DE, US
Brian Rodricks - Newark DE, US

Tracer Detection Technology Corp. - Syosset NY

G09C 5/00

380 54, 713185, 726 27

The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.

8270603, Sep 18, 2012

Aug 10, 2010

12/853768

David I. Durst - Syosset NY, US
Norman Kaish - Whitestone NY, US
Jay Fraser - Freeport NY, US
Michael Hoffberg - Bear DE, US
Brian Rodricks - Newark DE, US

Tracer Detection Technology Corp. - San Antonio TX

G09C 5/00

380 54

The present invention provides a method and apparatus for the production and labeling of objects in a manner suitable for the prevention and detection of counterfeiting. Thus, the system incorporates a variety of features that make unauthorized reproduction difficult. In addition, the present invention provides an efficient means for the production of labels and verification of authenticity, whereby a recording apparatus which includes a recording medium, having anisotrophic optical domains, along with a means for transferring a portion of the recording medium to a carrier, wherein a bulk portion of the recording medium has macroscopically detectable anisotrophic optical properties and the detecting apparatus thereon.

5491334, Feb 13, 1996

Aug 22, 1994

8/294724

Alvin Gartenberg - Dix Hills NY
David I. Durst - Syosset NY

Grumman Aerospace Corporation - Bethpage NY

G01J 104
G01J 500

25022721

A detector interface system communicates signals between an infrared detector element maintained in a cryogenic environment and associated signal processing circuitry maintained in a non-cryogenic environment. An optical modulator disposed within the cryogenic environment in electrical communication with the infrared detector element converts the electrical output of the infrared detector element into an optical output signal representative thereof. An optical demodulator disposed in the non-cryogenic environment converts the optical output signal of the optical modulator into an electrical signal. The optical demodulator is an electrical communication with the signal processing circuitry. An optical path from the optical modulator to the optical demodulator provides thermal isolation between the infrared detector element and its associated signal processing circuitry and minimizes detector bias so as to mitigate 1/f noise.

5061865, Oct 29, 1991

Jul 23, 1990

7/556539

David I. Durst - Syosset NY

Grumman Aerospace Corporation - Bethpage NY

G06G 712

307490

A non-linear transimpedance amplifier utilizing a reset integrator and having a broad dyamic range for amplifying an input signal over an extended range of levels is disclosed. The non-linear transimpedance amplifier comprises an accumulator for accumulating a charge representative of the input signal, a comparator for comparing the output of the first circuit to a reference voltage, a sample and hold for providing a voltage representative of the level of a time varying waveform at the instant during which the accumulator saturates, and a summer for summing a signal representative of the accumulated charge and the signal representative of the level of the time varying waveform. The output signal is representative of the input signal when the accumulator is unsaturated as well as when the accumulator is saturated. The present invention may also be operated as a linear amplifier. It finds particular application in the input circuits of infrared detector elements.

5974150, Oct 26, 1999

Jul 6, 1998

9/110315

Norman Kaish - West Hampstead NY
Jay Fraser - Freeport NY
David I. Durst - Syosset NY

Tracer Detection Technology Corp. - Syosset NY

H04K 100

380 25

An authentication system comprising a medium having a plurality of elements, the elements being distinctive, detectable and disposed in an irregular pattern or having an intrinsic irregularity. Each element is characterized by a determinable attribute distinct from a two-dimensional coordinate representation of simple optical absorption or simple optical reflection intensity. An attribute and position of the plurality of elements, with respect to a positional reference is detected. A processor generates an encrypted message including at least a portion of the attribute and position of the plurality of elements. The encrypted message is recorded in physical association with the medium. The elements are preferably dichroic fibers, and the attribute is preferably a polarization or dichroic axis, which may vary over the length of a fiber. An authentication of the medium based on the encrypted message may be authenticated with a statistical tolerance, based on a vector mapping of the elements of the medium, without requiring a complete image of the medium and elements to be recorded.

5574275, Nov 12, 1996

Mar 23, 1995

8/409361

David I. Durst - Syosset NY
Patrick L. Hayman - Mission Viega CA
Martin Klop - Great River NY

Northrop Grumman Corporation - Los Angeles CA

G01C 2102
G01J 142

2502082

An optical sensor and a method of operating an optical sensor. The optical sensor includes a plurality of unit cells, a plurality of groups of optical detectors, an amplifier and a plurality of selection circuits. Each of the unit cells includes at least first and second pixels, and each group of optical detectors is associated with a respective one of the unit cells. Each group of detectors includes at least first and second detectors to generate first and second electric signals representing the intensity of light incident on, respectively, the first and second pixels of the associated unit cell. Each of the selection circuits is associated with a respective one of the groups of detectors for transmitting to the amplifier the electric signals from the associated group of detectors. Also, each selection circuit has first and second modes for conducting to the amplifier, respectively, either the electric signal from only the first detector of the associated group of detectors, or the electric signals from both the first and second detectors of that associated group of detectors. By switching the selection circuit between the first and second modes, the sensor may operate at either a course resolution or a fine resolution.