Patents by Inventor Sydney O'Hara

Sydney O'Hara 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).

  • Semiconductor devices
    Patent number: 4099318
    Abstract: The invention relates to the fabrication of IMPATT diodes. The invention discloses a specific sequence of steps and enables diodes to be mass produced without technological variations.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: July 11, 1978
    Assignee: The Post Office
    Inventors: Kenneth Cooper, Ian Stanley Groves, Peter Alexander Leigh, Neil McIntyre, Sydney O'Hara, John Donald Speight