Dennis J Cahalan from Boulder, CO, age 68

Vertical Probe Card For Attachment Within A Central Corridor Of A Magnetic Field Generator
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US Patent:

6359453, Mar 19, 2002
Filed:

Feb 23, 1999
Appl. No.:

09/255477
Inventors:

James M. Forbis - Longmont CO
Dennis J. Cahalan - Longmont CO
Assignee:

Veeco Instruments Inc. - Woodbury NY
International Classification:

G01R 3102
US Classification:

324754, 324761, 324762, 324529
Abstract:

A vertical probe card assembly containing a plurality of vertical probe cards is mounted within a central corridor or opening within a magnetic field generator. Each of the vertical probe cards has a multiplicity of probe needles extending downwardly therefrom for electrically contacting test pads of a device under test that is positioned below the magnetic field generator.

Verticle Probe Card For Attachment Within A Central Corridor Of A Magnetic Field Generator
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US Patent:

6556031, Apr 29, 2003
Filed:

Mar 19, 2002
Appl. No.:

10/101987
Inventors:

James M. Forbis - Longmont CO
Dennis J. Cahalan - Longmont CO
Assignee:

Veeco Instruments Inc. - Woodbury NY
International Classification:

G01R 3102
US Classification:

324754, 324761, 324501, 324228
Abstract:

A vertical probe card assembly containing a plurality of vertical probe cards is mounted within a central corridor or opening within a magnetic field generator. Each of the vertical probe cards has a multiplicity of probe needles extending downwardly therefrom for electrically contacting test pads of a device under test that is positioned below the magnetic field generator.

Underwater Acoustic Array, Communication And Location System
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US Patent:

20130272098, Oct 17, 2013
Filed:

Apr 12, 2012
Appl. No.:

13/445108
Inventors:

Dennis Cahalan - Longmont CO, US
Ted Noonan - Louisville CO, US
Michel Hendricks - Boulder CO, US
Jeffrey Croghan - Longmont CO, US
Assignee:

CEEBUS TECNOLOGIES, LLC - Boulder CO
International Classification:

H04B 13/02
US Classification:

367134
Abstract:

An underwater communication system comprises a plurality of location and messaging units for sending and receiving ultrasonic energy through water. In accordance with one aspect, each of the location and messaging units comprising an array of four ultrasonic transducers positioned such that they define a generally tetrahedral shape, a transceiver adapted to generate a code element, generate a data element, generate a modulation element, and combine the code element, the data element and the modulation element into an analog wave form. The system is further adapted to transmit the analog wave form through each of the four ultrasonic transducers and receive the analog wave-form generated by at least one of the location and messaging units.

Method And Circuitry To Provide True Voltage Bias To A Magnetoresistive Head
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US Patent:

53092945, May 3, 1994
Filed:

Sep 8, 1992
Appl. No.:

7/941929
Inventors:

Dennis J. Cahalan - Boulder CO
Assignee:

Rocky Mountain Magnetics, Inc. - Louisville CO
International Classification:

G11B 503
US Classification:

360 66
Abstract:

The present invention is directed to a circuit and method for nullifying a drop in the voltage across an MR head caused a parasitic cable resistance. The invention uses local modeling of the cable resistance in order to generate a nulling voltage, equal in magnitude to the voltage across the cable resistance. The magnitude of the nulling voltage is adjusted as the resistance of the MR head varies within a population of heads. The nulling voltage is added to the bias voltage, in order to negate the effect of the cable resistance.

Dennis J Cahalan