Patents by Inventor Douglas R. Lester

Douglas R. Lester 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).

  • Electromagnetic flow probe
    Patent number: 4346604
    Abstract: An electromagnetic flow probe for measuring fluid flow, and featuring interchangeable magnet and electrode lumen structures. A complex electrode lead pattern is incorporated in a lumen unit through which the fluid flow is conducted. The magnet structure is equipped with a magnetic field adjustment capability, and adjustable alignment lugs for receiving the lumen unit.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: August 31, 1982
    Assignee: Narco Bio-Systems, Inc.
    Inventors: Richard K. Snook, Douglas R. Lester, William C. Childs, deceased