Patents by Inventor Robert H. Saul

Robert H. Saul 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).

  • Asymmetric chip design for LEDS
    Patent number: 4700210
    Abstract: The area of a surface-emitting LED is reduced, and hence the number of LEDs which can be obtained from a single wafer is increased, by a chip design in which the light-emitting spot is positioned asymmetrically toward one corner of the chip. Preferably, an L-shaped contact is formed on the light output surface so that light-emitting spot emerges from between the legs of the L.
    Type: Grant
    Filed: November 21, 1984
    Date of Patent: October 13, 1987
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Randolph H. Burton, Irfan Camlibel, Robert H. Saul
  • 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