Patents by Inventor David C. Bishop

David C. Bishop 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: 11464559
    Abstract: Various aspects of a generator, ultrasonic device, and method for estimating a state of an end effector of an ultrasonic device are disclosed. The ultrasonic device includes an electromechanical ultrasonic system defined by a predetermined resonant frequency, including an ultrasonic transducer coupled to an ultrasonic blade. A control circuit measures a complex impedance of an ultrasonic transducer, wherein the complex impedance is defined as Z g ? ( t ) = V g ? ( t ) I g ? ( t ) . The control circuit receives a complex impedance measurement data point and compares the complex impedance measurement data point to a data point in a reference complex impedance characteristic pattern. The control circuit then classifies the complex impedance measurement data point based on a result of the comparison analysis and assigns a state or condition of the end effector based on the result of the comparison analysis.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: October 11, 2022
    Assignee: Cilag GmbH International
    Inventors: Cameron R. Nott, Foster B. Stulen, Fergus P. Quigley, John E. Brady, Gregory A. Trees, Amrita Singh Sawhney, Rafael J. Ruiz Ortiz, Patrick J. Scoggins, Kristen G. Denzinger, Craig N. Faller, Madeleine C. Jayme, Alexander R. Cuti, Matthew S. Schneider, Brian D. Black, Maxwell Rockman, Gregory D. Bishop, Frederick E. Shelton, IV, David C. Yates
  • Patent number: 4618994
    Abstract: A tap for a urostomy or similar bag has a first valve member which includes a male valve element located in a cap. The cap has at least one drainage hole. A second valve member including a tubular female valve element is engageable with the male valve element to close the tap, but is disengageable from the male valve element to open the tap. Flexible and/or extendible diaphragm or sheath is secured to and encloses part of the female valve element in a fluid-tight manner and is also connected to the cap in a fluid-tight manner. The diaphragm or sheath permits relative movement between the two valve members.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: October 21, 1986
    Assignee: Smiths Industries Public Limited Company
    Inventor: David C. Bishop
  • Patent number: 4561439
    Abstract: A tubular surgical instrument such as a thrombectomy catheter or gall stone dislodger comprises a shaft of plastics material with a coiled spring projecting from its forward end. A portion of the spring is secured in a coupling portion at the distal end of the shaft. The coupling portion has an outer surface with a recess which flares forwards from a shoulder of the shaft towards an annular support surface. The spring is secured in the coupling portion. A balloon is inflatable by fluid pressure applied through a lumen in the shaft. An end of the balloon is located in the recess and is secured by a tie. The balloon is secured directly or indirectly to the spring by a second tie forward of the first. The instruments are primarily intended for use as aortic or venous catheters and especially thrombectomy catheters, but can also be used for example as gall stone dislodgers.
    Type: Grant
    Filed: February 4, 1983
    Date of Patent: December 31, 1985
    Assignee: Matburn (Holdings) Limited
    Inventors: David C. Bishop, Gordon L. Lawrence
  • Patent number: 4436824
    Abstract: The method assesses the level of general and specific cellular immunocompetence by measuring the responses of individuals to antigens in vitro employing the phenomenon of Leukocyte Migration Inhibition (LMI). The present invention differs from the previously described LMI technique in that antigens are individually incorporated into the agarose of assay plates, requiring no preincubation of antigens with patient blood cell (leukocyte) suspensions. The LMI assay method described herein is a practical alternative to delayed hypersensitivity skin testing to identify cellular immune deficiency and avoids the risk and inconvenience of the skin test procedure. The method also allows in vitro diagnosis of Tuberculosis and monitoring of tumor therapy.
    Type: Grant
    Filed: June 9, 1981
    Date of Patent: March 13, 1984
    Assignee: Ortho Diagnostic Systems, Inc.
    Inventor: David C. Bishop
  • Patent number: 4351887
    Abstract: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.
    Type: Grant
    Filed: April 22, 1980
    Date of Patent: September 28, 1982
    Assignee: Johnson, Matthey & Co., Limited
    Inventors: David C. Bishop, Alan E. Heywood
  • Patent number: 4059929
    Abstract: A system for supplying an abrasive-containing liquid to a lapping or polishing machine includes a supply of abrasive slurry concentrate containing abrasive grain which is suspended in a liquid, a supply of diluent liquid which is essentially free from solids, and a mixing chamber positioned relatively close to a desired work surface. The slurry concentrate and diluent are separately conveyed under pressure to the mixing chamber to develop a diluted slurry concentrate which is sufficiently diluted to permit settling out of the abrasive grain. The diluted slurry is then supplied to the work surface.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: November 29, 1977
    Assignee: Chemical-Ways Corporation
    Inventor: David C. Bishop
  • Patent number: RE32549
    Abstract: This invention relates to a laminated article, particularly to such an article comprising a gauze pack containing two or more gauzes such as are typically used as catalyst catchment or getter means in nitric acid production plants.Specifically, this invention provides a gauze pack segment suitable for locating in planar contiguous relationship with one or more further gauze pack segments to provide a gauze pack having a predetermined, for example, a regular geometric shape comprises a plurality of superposed gauze segments having at least when assembled substantially identical shape and area and held in fixed relationship one with another.
    Type: Grant
    Filed: September 24, 1984
    Date of Patent: November 24, 1987
    Assignee: Johnson Matthey & Co., Limited
    Inventors: David C. Bishop, Alan E. Heywood
  • Patent number: D362434
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: September 19, 1995
    Assignee: Lexmark International, Inc.
    Inventors: William A. Abell, Jr., David C. Bishop, Edwin T. Coleman, III, John M. Huellemeier, Charles H. Lingle, Peter J. Mendel, Kenneth H. Mimlitch, Edward E. Pollard, Steven A. Silverstein
  • Patent number: D366494
    Type: Grant
    Filed: September 2, 1994
    Date of Patent: January 23, 1996
    Assignee: Lexmark International, Inc.
    Inventor: David C. Bishop
  • Patent number: D368259
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: March 26, 1996
    Assignee: Lexmark International, Inc.
    Inventors: David C. Bishop, Peter J. Mendel