Patents by Inventor T. V. Rao

T. V. Rao 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).

  • Method of processing open-celled microcellular polymeric foams with controlled porosity for use as vascular grafts and stent covers
    Patent number: 6702849
    Abstract: Porous vascular grafts and stent covers are formed of open-celled microcellular polymeric foams having a porosity that can be modified to be adapted for carrying and delivering different types of therapeutic drugs. A stent cover is formed of a tubular member including at least one layer of a porous, microcellular foam formed from a polymeric material capable of absorbing and releasing therapeutic drugs at predictable rates for delivery of the therapeutic drugs in localized drug therapy in a blood vessel. A composite metal and polymer vascular graft is formed of an interior structural stent member, and an outer layer or coating of the porous, microcellular foam.
    Type: Grant
    Filed: December 13, 1999
    Date of Patent: March 9, 2004
    Assignee: Advanced Cardiovascular Systems, Inc.
    Inventors: Debashis Dutta, Chicheng Wang, Kondapavulur T. V. Rao
  • Method and apparatus for treatment of atrial fibrillation
    Patent number: 5674251
    Abstract: A pacemaker system adapted to deliver pacing pulses in the presence of fibrillation. The pacing pulses are delivered via large surface area electrodes of the type normally used to accomplish defibrillation or cardioversion using high voltage pulses. An extended pulse train is delivered in order to gradually entrain greater portions of heart tissue, until a sufficient percentage of tissue is entrained to interrupt fibrillation. The invention is believed most applicable to treatment of atrial fibrillation.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: October 7, 1997
    Assignee: Medtronic, Inc.
    Inventors: William J. Combs, Edwin G. Duffin, T. V. Rao
  • Method and apparatus for treatment of atrial fibrillation
    Patent number: 5562708
    Abstract: A pacemaker system adapted to deliver pacing pulses in the presence of fibrillation. The pacing pulses are delivered via large surface area electrodes of the type normally used to accomplish defibrillation or cardioversion using high voltage pulses. An extended pulse train is delivered in order to gradually entrain greater portions of heart tissue, until a sufficient percentage of tissue is entrained to interrupt fibrillation. The invention is believed most applicable to treatment of atrial fibrillation.
    Type: Grant
    Filed: April 21, 1994
    Date of Patent: October 8, 1996
    Assignee: Medtronic, Inc.
    Inventors: William J. Combs, Edwin G. Duffin, T. V. Rao
  • Electrochemical cell construction and fill method
    Patent number: 4695519
    Abstract: A method of filling an electrochemical cell container having a penetrable, self-sealing septum.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: September 22, 1987
    Assignee: Medtronic, Inc.
    Inventors: T. V. Rao, Robert C. Samec
  • Leak detection for hermetic enclosures
    Patent number: 4398413
    Abstract: A method of leak testing hermetic enclosures having a penetrable, self-sealing septum communicating with the interior thereof.Test gas is introduced into the enclosure by means of a hypodermic needle inserted through the septum and then withdrawn. Subsequent monitoring of the enclosure for presence of any escaping test gas confirms if leakage is occurring.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: August 16, 1983
    Assignee: Medtronic, Inc.
    Inventor: T. V. Rao
  • Electrochemical cell construction
    Patent number: 4360573
    Abstract: Electrochemical cell containers having a penetrable, self-sealing septum for filling.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: November 23, 1982
    Assignee: Medtronic, Inc.
    Inventors: T. V. Rao, Thomas M. Nutzman