Patents by Inventor Roy L. Campbell

Roy L. Campbell 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).

  • Double lumened catheter
    Patent number: 4036210
    Abstract: This invention comprises a novel aspiration-administration assembly which includes a fluid receptacle, a double lumened catheter, and a flow control means to simultaneously administer oxygen and perform aspiration functions.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: July 19, 1977
    Inventors: Roy L. Campbell, Steven Loveland