Patents by Inventor Isaac Chang

Isaac Chang 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).

  • Publication number: 20170350031
    Abstract: An overlay of a sliding component, such as a sliding component for an engine, may provide a bearing surface against a steel journal, for example. The overlay may include intermetallic particles disposed in a matrix including tin (Sn). The matrix may be formed by electroplating. Examples of intermetallic particles include, but are not limited to, aluminides and nickel aluminides. The matrix may include an electroplated matrix of tin and/or a tin alloy.
    Type: Application
    Filed: June 1, 2017
    Publication date: December 7, 2017
    Inventors: John Carey, Isaac Chang, Roger Gorges, Ian Laing, David Latham
  • Patent number: 7173446
    Abstract: According to one embodiment a system is disclosed. The system includes a tester having a power supply, an integrated circuit device under test (DUT) and a transient compressor (TC) coupled between the tester and the power supply to stabilize power delivered to the DUT by injecting current into the path between the power supply and the DUT.
    Type: Grant
    Filed: June 24, 2004
    Date of Patent: February 6, 2007
    Assignee: Intel Corporation
    Inventors: Arthur R. Isakharov, Isaac Chang, Ai Ssa Chai, Timothy M. Swettlen
  • Publication number: 20050285613
    Abstract: According to one embodiment a system is disclosed. The system includes a tester having a power supply, an integrated circuit device under test (DUT) and a transient compressor (TC) coupled between the tester and the power supply to stabilize power delivered to the DUT by injecting current into the path between the power supply and the DUT.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 29, 2005
    Inventors: Arthur Isakharov, Isaac Chang, Ai Ssa Chai, Timothy Swettlen
  • Publication number: 20050150759
    Abstract: The invention relates to a process for the production of submicron particles (26) and comprises the steps of: (i) placing first and second electrodes, (6, 10) in a volume of coolant, such that the electrodes (6, 10) are mutually spaced, (ii) passing an electrical current across the electrodes to generate an electrical arc (24) between them, (iii) maintaining a stable arc (24) by controlling the relative spacing between the two electrodes (6, 10) to melt or evaporate and separate material from at least one of the electrodes (6, 10) such that droplets of said material are formed, and (iv) quenching said droplets to form said submicron particles (26) of the material in the coolant. The invention also relates to a powder coating method and to an apparatus for performing the methods of the invention.
    Type: Application
    Filed: March 24, 2003
    Publication date: July 14, 2005
    Inventor: Isaac Chang
  • Patent number: 5673704
    Abstract: A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia.
    Type: Grant
    Filed: May 28, 1996
    Date of Patent: October 7, 1997
    Inventors: Francis E. Marchlinski, David S. Schwartzman, Mark S. Mirotznik, Kenneth R. Foster, Charles D. Gottlieb, Isaac Chang
  • Patent number: 5562721
    Abstract: A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: October 8, 1996
    Assignees: University of Pennsylvania, Philadelphia Heart Institute, Catholic University of America
    Inventors: Francis E. Marchlinski, David S Schwartzman, Mark S. Mirotznik, Kenneth R. Foster, Charles D. Gottlieb, Isaac Chang
  • Patent number: 5447529
    Abstract: A method of locating infarcted myocardial tissue in a beating heart includes the step of inserting an impedance measuring tip of a catheter into the chamber of the beating heart, particularly the left or right ventricle, and measuring the impedance of the endocardium at various locations within the chamber of the beating heart. The values measured are compared to impedance values with a predetermined range of values to identify an infarcted area of myocardium and distinguish such area from normal myocardium. The measurements are also compared to a range of values for an infarction border zone. In accordance with the invention, the infarction border zone may be located. The infarction border zone is a significant source of arrhythmia, and particularly of ventricular tachycardia.
    Type: Grant
    Filed: January 28, 1994
    Date of Patent: September 5, 1995
    Assignees: Philadelphia Heart Institute, The Trustees of the University of Pennsylvania, Catholic University of America
    Inventors: Francis E. Marchlinski, David S. Schwartzman, Mark S. Mirotznik, Kenneth R. Foster, Charles D. Gottleb, Isaac Chang