Patents by Inventor Al R. Roshdieh

Al R. Roshdieh 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).

  • Automatic or manual circuit restoration apparatus after a prescribed time delay
    Patent number: 5097379
    Abstract: A circuit is provided which responds to single or multiphase low or lost voltage situations and in the case of multiphase systems to phase reversals or shifts to disconnect a single or multiphase load from its source. A timing circuit is provided which prevents reactivation of the load until a prescribed time interval has elapsed. The reactivation may be either automatic or manual.
    Type: Grant
    Filed: November 22, 1989
    Date of Patent: March 17, 1992
    Inventors: John F. Walton, Al R. Roshdieh
  • Long-life luminaires
    Patent number: 5012157
    Abstract: There is provided a luminaire primarily for use with exit signs and other emergency-type lighting comprising a series string of low-voltage, extremely long-life bulbs positioned within an enclosure for protection and electrically connected to a standard base whereby luminaires having lives of 10 to 30 years may replace standard bulbs without the requirement of retrofitting.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: April 30, 1991
    Inventors: John F. Walton, Al R. Roshdieh
  • Long-life luminaires
    Patent number: 4782429
    Abstract: There is provided a luminaire primarily for use with exit signs and other emergency-type lighting comprising a series string of low-voltage, extremely long-life filaments positioned within a sealed enclosure for protection and electrically connected to a standard base whereby luminaires having lives of 10 to 30 years may replace standard bulbs without the requirement of retrofitting.
    Type: Grant
    Filed: April 10, 1987
    Date of Patent: November 1, 1988
    Inventors: John F. Walton, Al R. Roshdieh