Patents by Inventor Claude E. Nowlin

Claude E. Nowlin 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).

  • System for identifying individual drill pipe
    Patent number: 4578991
    Abstract: System is for identifying individual drill pipes. It uses a group of non-ferrous rings on the outside surface of an individual drill pipe. The rings are arranged in a predetermined order and spacing to represent an individual identification. There is a means for sensing the non-ferrous rings, and means for determining the individual identification as the pipe is translated longitudinally relative to the sensing means.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: April 1, 1986
    Assignee: Texaco Inc.
    Inventor: Claude E. Nowlin