Patents by Inventor Ronald J. Roedel

Ronald J. Roedel 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).

  • Monolithic opto-isolator
    Patent number: 4275404
    Abstract: A monolithic opto-isolator is fabricated on an insulating substrate by using a graded bandgap semiconductor material for the LED and photodetector and spacing the LED from the photodetector with insulating channels.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: June 23, 1981
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Daniel R. Cassiday, Vassilis G. Keramidas, Ronald J. Roedel, Robert H. Saul