Patents by Inventor Michael D. Stevens
Michael D. Stevens has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240125816Abstract: A probe head with a cylindrical portion and an oblique truncated portion angled downward toward a high-powered electronic device under testing. The probe head has a proximal end comprising an oblique truncated cone portion angled relative to the longitudinal axis at an input angle and has an analog signal input. The probe head has a digital signal output provided on the distal end of the housing.Type: ApplicationFiled: October 13, 2023Publication date: April 18, 2024Inventors: Michael J Mende, Mark Heimann, Richard Booman, Philipp Palffy-Daun-Seiler, Michael Engels, Nadja Laeaeperi, Benno Jacobs, Michael D Stevens, Nicolas Frabasile, Peter Hildenhagen, Kai Klein, Jurij Weber, Iris Zimmermann, Juergen Trueller, Thomas Podrebersek, Michael Eube, Frank Pannes, Matthew M Mende
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Publication number: 20240094233Abstract: The present invention relates to methods, devices and systems for associating consumable data with an assay consumable used in a biological assay. Provided are assay systems and associated consumables, wherein the assay system adjusts one or more steps of an assay protocol based on consumable data specific for that consumable. Various types of consumable data are described, as well as methods of using such data in the conduct of an assay by an assay system. The present invention also relates to consumables (e.g., kits and reagent containers), software, data deployable bundles, computer-readable media, loading carts, instruments, systems, and methods, for performing automated biological assays.Type: ApplicationFiled: July 18, 2023Publication date: March 21, 2024Inventors: Jacob N. WOHLSTADTER, Manish KOCHAR, Peter J. BOSCO, Ian D. CHAMBERLIN, Bandele JEFFREY-COKER, Eric M. JONES, Gary I. KRIVOY, Don E. KRUEGER, Aaron H. LEIMKUEHLER, Pei-Ming WU, Kim-Xuan NGUYEN, Pankaj OBEROI, Louis W. PANG, Jennifer PARKER, Victor PELLICIER, Nicholas SAMMONS, George SIGAL, Michael L. VOCK, Stanley T. SMITH, Carl C. STEVENS, Rodger D. OSBORNE, Kenneth E. PAGE, Michael T. WADE, Jon WILLOUGHBY, Lei WANG, Xinri CONG, Kin NG
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Patent number: 8810258Abstract: A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the signal acquisition probe is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system having an input amplifier with feedback loop circuitry and a shunt pole-zero pair coupled to the input circuitry providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.Type: GrantFiled: January 4, 2013Date of Patent: August 19, 2014Assignee: Tektronix, Inc.Inventors: Josiah A. Bartlett, Ira G. Pollock, Daniel G. Knierim, Michael D. Stevens
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Patent number: 8430686Abstract: An electrical connector assembly includes a connector body having a connector longitudinal axis. A wing portion integrally connected to the connector body has an aperture with an aperture longitudinal axis oriented parallel to the connector longitudinal axis. A pin is fixed in the wing portion aperture having a pin portion extending away from the wing portion such that a pin longitudinal axis is oriented parallel to the connector longitudinal axis. A threaded connection portion axially extends from the connector body co-axial to the connector longitudinal axis. A panel nut is threaded onto the threaded connection portion to retain a panel between the panel nut and the connector body with the threaded connection portion extending through a panel aperture. The pin is received in a panel bore in an installed condition preventing connector assembly axial rotation with respect to the connector longitudinal axis when torque is applied to the panel nut.Type: GrantFiled: December 3, 2010Date of Patent: April 30, 2013Assignee: Harris CorporationInventors: Howard M. Sheehan, Michael D. Stevens
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Patent number: 8364976Abstract: A pass-through adapter includes an adapter body having at least two connector pin interfaces, with one configured for coupling to an external device such as a communications device. Each connector pin interface includes a plurality of connector pins, including a plurality of pass-through connector pins operative with each other for in-line, pass-through signaling when the pass-through adapter is coupled to the external device. A crypto ignition key (CIK) circuit is contained within the adapter body and connected to at least one of the connector pins to provide a secure mode of operation for the external device.Type: GrantFiled: March 25, 2008Date of Patent: January 29, 2013Assignee: Harris CorporationInventors: Christopher D. Mackey, Duncan G. Harris, Michael D. Stevens, Scott E. Bartholomew
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Publication number: 20120142213Abstract: An electrical connector assembly includes a connector body having a connector longitudinal axis. A wing portion integrally connected to the connector body has an aperture with an aperture longitudinal axis oriented parallel to the connector longitudinal axis. A pin is fixed in the wing portion aperture having a pin portion extending away from the wing portion such that a pin longitudinal axis is oriented parallel to the connector longitudinal axis. A threaded connection portion axially extends from the connector body co-axial to the connector longitudinal axis. A panel nut is threaded onto the threaded connection portion to retain a panel between the panel nut and the connector body with the threaded connection portion extending through a panel aperture. The pin is received in a panel bore in an installed condition preventing connector assembly axial rotation with respect to the connector longitudinal axis when torque is applied to the panel nut.Type: ApplicationFiled: December 3, 2010Publication date: June 7, 2012Applicant: Harris CorporationInventors: Howard M. Sheehan, Michael D. Stevens
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Patent number: 8149454Abstract: A method of operating a color printer including using a first set of one-dimensional TRCs or a second set of one-dimensional TRCs with a single set of color tables.Type: GrantFiled: June 9, 2005Date of Patent: April 3, 2012Assignee: Xerox CorporationInventors: Meng Yao, Michael T. Stevens, Paul W. Philippi, Michael D. Stevens
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Publication number: 20090246985Abstract: A pass-through adapter includes an adapter body having at least two connector pin interfaces, with one configured for coupling to an external device such as a communications device. Each connector pin interface includes a plurality of connector pins, including a plurality of pass-through connector pins operative with each other for in-line, pass-through signaling when the pass-through adapter is coupled to the external device. A crypto ignition key (CIK) circuit is contained within the adapter body and connected to at least one of the connector pins to provide a secure mode of operation for the external device.Type: ApplicationFiled: March 25, 2008Publication date: October 1, 2009Applicant: Harris CorporationInventors: Christopher D. Mackey, Duncan G. Harris, Michael D. Stevens, Scott E. Bartholomew
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Patent number: 7532492Abstract: An accessory device voltage management system includes an accessory device selectively coupled to a host. The host provides a bulk power supply and a low power supply voltage to the accessory device. The host receives accessory device parameters from the device and determines if the accessory device is a valid and supported device and, if so, sends commands to the accessory device to couple the bulk power supply voltage to a power supply circuit in the accessory device. The power supply circuit in the accessory device generates at least a first regulated voltage output.Type: GrantFiled: December 20, 2005Date of Patent: May 12, 2009Assignee: Tektronix, Inc.Inventors: Kenneth P. Dobyns, Michael J. Mende, Richard A. Van Epps, Michael D. Stevens
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Patent number: 7511858Abstract: A method of printing a test pattern including printing cyan or magenta in a test region using a default printer half-tone, printing a yellow in a reference area portion of the test region using a coarse clustered dot half-tone, and printing different levels of yellow in test patch regions of the test region using a default printer half-tone.Type: GrantFiled: December 14, 2004Date of Patent: March 31, 2009Assignee: Xerox CorporationInventors: Michael D. Stevens, Audrey A. Lester
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Patent number: 7255162Abstract: The present invention relates to subterranean cementing operations, and more particularly to an apparatus useful in loading cementing plugs and darts into tubulars, and methods of using such apparatus in subterranean cementing operations. An example of a method of the present invention is a method of placing a compressible object having a cross-section within a tubular, including the steps of: reducing the cross-section of the compressible object; placing the compressible object with the reduced cross-section in a tubular; and releasing the compressible object within the tubular. Another example of a method of the present invention is a method of reducing the radial cross-section of a compressible object. Other examples of apparatus of the present invention include apparatus for placing a compressible object into a tubular.Type: GrantFiled: May 7, 2004Date of Patent: August 14, 2007Assignee: Halliburton Energy Services, Inc.Inventors: Michael D. Stevens, David D. Szarka, Kevin T. Berscheidt, Henry E. Rogers, Brett A. Fears
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Patent number: 7164994Abstract: A differential termination and attenuator network having an internal common mode termination voltage generator includes first and second termination resistors coupled in parallel with corresponding resistive attenuator circuits. A monitoring circuit coupled to input nodes of the network generates an output signal representative of the combination of a DC common mode voltage on the input nodes and an internal termination voltage. A control circuit generates scaled termination and compensation voltages and associated drive currents using the internal termination voltage and the monitoring circuit output signal. The scaled termination voltage and the scaled compensation voltage operate on the differential termination and attenuation network to optimize the dynamic range of a differential amplifier connected to the first and second attenuator outputs and null the DC currents at the input of the network.Type: GrantFiled: February 4, 2005Date of Patent: January 16, 2007Assignee: Tektronix, Inc.Inventors: Richard A. Van Epps, Ira G. Pollock, Michael D. Stevens, Dale R. Daniels
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Patent number: 7108068Abstract: A back pressure valve assembly for use in a well casing string. The valve assembly comprises a housing with a stationary and a floating plate therein. The floating plate is moveable between an open position spaced from the stationary plate and a closed position engaging the stationary plate. Fluid flow downwardly through the valve assembly tends to move the floating plate toward the open position, and fluid flow upwardly through the valve assembly tends to move the floating plate toward the closed position. A finger or key may be used to prevent rotation of the floating plate with respect to the housing.Type: GrantFiled: June 15, 2004Date of Patent: September 19, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Michael D. Stevens, Earl D. Webb
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Patent number: 6997253Abstract: An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.Type: GrantFiled: January 15, 2004Date of Patent: February 14, 2006Assignee: Halliburton Energy Services, Inc.Inventors: Earl D. Webb, Michael D. Stevens, John C. Zimmerman
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Patent number: 6896051Abstract: An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.Type: GrantFiled: January 15, 2004Date of Patent: May 24, 2005Assignee: Halliburton Energy Services, Inc.Inventors: Earl D. Webb, Michael D. Stevens, Steven L. Holden
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Publication number: 20040261991Abstract: An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.Type: ApplicationFiled: January 15, 2004Publication date: December 30, 2004Inventors: Earl D. Webb, Michael D. Stevens, John C. Zimmerman
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Patent number: 6820695Abstract: A float apparatus for use in a casing string. The float apparatus includes an outer case having a check valve positioned therein. A body portion which may be comprised of high compressive strength cement affixes the check valve to the outer case. The check valve includes a valve body and a valve element. The valve body defines a valve seat and the valve element is deformable so that it will conform to the shape of the valve seat and seal against flow in the casing.Type: GrantFiled: July 11, 2002Date of Patent: November 23, 2004Assignee: Halliburton Energy Services, Inc.Inventors: Michael D. Stevens, Earl D. Webb, Aimee K. Greening
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Patent number: 6817760Abstract: A current probe transformer temperature monitoring method determines an initial transformer temperature of the current probe as a function of the winding resistance of the transformer. A relative temperature of the Hall Effect device is also determined as a function of resistance change of the Hall Effect device. The initial transformer temperature and the relative Hall Effect device temperature are combined to produce a continuous transformer temperature indicative of the temperature of the transformer. The current signal to the multi-turn winding is removed when the continuous transformer temperature exceeds a threshold temperature value and a visual indication may be provided.Type: GrantFiled: September 22, 2003Date of Patent: November 16, 2004Assignee: Tektronix, Inc.Inventors: Michael J. Mende, Jonathan S. Dandy, Michael D. Stevens, Albert S. Crane, Jr.
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Patent number: 6796377Abstract: An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.Type: GrantFiled: July 23, 2002Date of Patent: September 28, 2004Assignee: Halliburton Energy Services, Inc.Inventors: Charles A. Butterfield, Jr., Henry E. Rogers, Earl D. Webb, Michael D. Stevens
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Publication number: 20040144531Abstract: An apparatus for preventing or limiting the rotation of cementing plugs in a casing string during drillout. The apparatus includes an outer housing with a sleeve disposed therein. The sleeve has an inner surface configured to engage cementing plugs received therein to cause an interference fit. The sleeve will hold the cementing plugs when rotational forces, such as drilling forces, are applied so that during drillout, rotation of the cementing plug is prevented or is at least limited.Type: ApplicationFiled: January 15, 2004Publication date: July 29, 2004Inventors: Earl D. Webb, Michael D. Stevens, Steven L. Holden