Patents by Inventor R. Thomas

R. Thomas 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 and material for detecting and quantitating fetal erythrocytes in adults
    Patent number: 3975156
    Abstract: By differential elution of hemoglobin from fetal and adult erythrocytes using a succinic acid/succinate or a malic acid/malate buffer, fetal erythrocytes in adult blood may be detected and quantitated.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: August 17, 1976
    Assignee: Ortho Diagnostics, Inc.
    Inventors: Patricia J. Kraft, Marcia R. Thomas, Larry A. Kraft
  • Air powered water propulsion method and apparatus
    Patent number: 3957007
    Abstract: A vessel operable by a diver for use in towing himself has an air motor powered by the diver's air tank. All or part of the air used by the diver passes through the motor. Air used by the motor in excess of air needed for breathing is exhausted into the vessel wake to reduce drag. A manifold, connected to the diver's air breathing means and to the tank, provides air connections to the vessel during towing operations and is quickly detachable and provides connection from the tank to the air breathing means when the diver operates away from the vessel.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: May 18, 1976
    Assignee: The Thomas Company
    Inventor: John R. Thomas