Patents by Inventor Joseph M. Stevens

Joseph M. 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).

  • Patent number: 11970406
    Abstract: Automated systems to make target compounds from slide stainer waste streams inactive utilizing advanced oxidation processes are described herein. Advanced oxidation processes are promoted by UV irradiation and further accelerated by use of radical initiators, such as hydrogen peroxide. The automated systems further include mechanisms for segregating components of the waste streams.
    Type: Grant
    Filed: June 9, 2022
    Date of Patent: April 30, 2024
    Assignee: Ventana Medical Systems, Inc.
    Inventors: Nathan Crum, Joseph M. Jakubowski, Jerome W. Kosmeder, II, Eric May, Michael Otter, Taylor J. Shingler, Benjamin C. Stevens
  • Patent number: 8363736
    Abstract: A test circuit for a serial link receiver includes a first current source coupled to a first input of the serial link receiver, and a second current source coupled to a second input of the serial link receiver. The first current source is symmetrically matched to the second current source. A first switch of the first current source is turned on to permit a charge-retaining mechanism thereof to be charged. A second switch of the first current source is turned on to permit the retained charge retained to be asserted on the first input. The charge turns on a control switch of the first current source, through which the charge is asserted on the first input. A charge-draining mechanism of the first current source is turned on to thereafter permit the charge to be drained in a controlled manner after the charge has been asserted.
    Type: Grant
    Filed: March 10, 2011
    Date of Patent: January 29, 2013
    Assignee: International Business Machines Corporation
    Inventors: Hayden C. Cranford, Daniel P. Greenberg, Joseph M. Stevens, Westerfield J. Ficken
  • Publication number: 20110156663
    Abstract: A test circuit for a serial link receiver includes a first current source coupled to a first input of the serial link receiver, and a second current source coupled to a second input of the serial link receiver. The first current source is symmetrically matched to the second current source. A first switch of the first current source is turned on to permit a charge-retaining mechanism thereof to be charged. A second switch of the first current source is turned on to permit the retained charge retained to be asserted on the first input. The charge turns on a control switch of the first current source, through which the charge is asserted on the first input. A charge-draining mechanism of the first current source is turned on to thereafter permit the charge to be drained in a controlled manner after the charge has been asserted.
    Type: Application
    Filed: March 10, 2011
    Publication date: June 30, 2011
    Applicant: International Business Machines Corporation
    Inventors: Hayden C. Cranford, Daniel P. Greenberg, Joseph M. Stevens, Westerfield J. Ficken
  • Patent number: 7940846
    Abstract: A test circuit for a serial link receiver includes a first current source coupled to a first input of the serial link receiver, and a second current source coupled to a second input of the serial link receiver. The first current source is symmetrically matched to the second current source. A first switch of the first current source is turned on to permit a charge-retaining mechanism thereof to be charged. A second switch of the first current source is turned on to permit the retained charge retained to be asserted on the first input. The charge turns on a control switch of the first current source, through which the charge is asserted on the first input. A charge-draining mechanism of the first current source is turned on to thereafter permit the charge to be drained in a controlled manner after the charge has been asserted.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: May 10, 2011
    Assignee: International Business Machines Corporation
    Inventors: Hayden C. Cranford, Jr., Daniel P. Greenberg, Joseph M. Stevens, Westerfield J. Ficken
  • Publication number: 20110057727
    Abstract: A method and apparatus for extending the common mode range of a differential amplifier. A circuit has a common mode detection circuit, a common mode voltage inversion circuit, and a differential amplifier. The common mode detection circuit receives a differential signal and detects a common mode voltage. The common mode voltage inversion circuit is coupled to the common mode detection circuit. The common mode voltage inversion circuit has an input node that receives the common mode voltage and an output node that outputs body voltage, wherein the common mode voltage inversion circuit creates an inverse relationship between the common mode voltage and the body voltage. The differential amplifier includes a differential pair of transistors that have a pair of body terminals coupled to the output node of the common mode voltage inversion circuit.
    Type: Application
    Filed: September 10, 2009
    Publication date: March 10, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hayden C. Cranford, JR., Todd M. Rasmus, Joseph M. Stevens
  • Publication number: 20080165837
    Abstract: A test circuit for a serial link receiver includes a first current source coupled to a first input of the serial link receiver, and a second current source coupled to a second input of the serial link receiver. The first current source is symmetrically matched to the second current source. A first switch of the first current source is turned on to permit a charge-retaining mechanism thereof to be charged. A second switch of the first current source is turned on to permit the retained charge retained to be asserted on the first input. The charge turns on a control switch of the first current source, through which the charge is asserted on the first input. A charge-draining mechanism of the first current source is turned on to thereafter permit the charge to be drained in a controlled manner after the charge has been asserted.
    Type: Application
    Filed: January 8, 2007
    Publication date: July 10, 2008
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Hayden C. Cranford, Daniel P. Greenberg, Joseph M. Stevens, Westerfield J. Ficken
  • Patent number: 7332932
    Abstract: A circuit device and method for designing a serial link receiver, which accommodates a wide input voltage range and provides tolerance to high termination voltages. The receiver is designed with a pair of RC networks connected inline between the input and the preamplifier and a common mode feedback loop, which monitors shifts in the common mode voltage and adjusts the inputs provided to the preamplifier. The circuit device maintains a flat bandwidth to accommodate all signaling rates.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: February 19, 2008
    Assignee: International Business Machines Corporation
    Inventors: Hayden C. Cranford, Westerfield J. Ficken, David A. Freitas, Joseph M. Stevens
  • Patent number: 7034566
    Abstract: Aspects for increased noise immunity for clocking signals in high speed digital systems are described. The aspects include buffering a differential clock signal with a single buffer circuit for a plurality of load circuits and configuring the single buffer circuit to adjust to alterations in the number of load circuits receiving the differential clock signal. The configuring achieves a constant bandwidth and voltage level for the clock signal output while adjusting to alterations in the number of load circuits.
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: April 25, 2006
    Assignee: International Business Machines Corporation
    Inventors: Hayden C. Cranford, Jr., Joseph M. Stevens