Patents by Inventor Howard T. Pettas

Howard T. Pettas 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).

  • Electron beam tube arrangements having the input cavity comprised of electrically internal and external body portions
    Patent number: 5548245
    Abstract: A linear electron beam tube has voltages provided thereto, an electron gun, and an output resonant cavity operatively arranged together. An internal body portion, an external body portion and an insulating portion are provided. The internal body portion, external body portion, and insulating portion at least partially define an annular input resonant cavity. The internal body portion is provided with a high voltage, with respect to the external body portion, and the internal and external body portions are separated by the insulating portion so that the internal and external body portions have no electrically conductive connection therebetween. The internal body portion is in electrical contact with the electron gun. The annular input resonant cavity at least partially defined by the internal and external body portions surrounds the electron gun.
    Type: Grant
    Filed: May 13, 1993
    Date of Patent: August 20, 1996
    Assignee: EEV Limited
    Inventors: Heinz P. Bohlen, Edward S. Sobieradski, Mark Bridges, Steven Bardell, Alan H. Pickering, Howard T. Pettas