Patents Assigned to Thunderbolt Corporation
  • Floor imbedded door bolt
    Patent number: 4343500
    Abstract: A security door stop bolt mounted in the floor preventing entrance through the door including a tube housing imbedded in the floor with a door stop sliding in the tube, nestled in the tube when not in use but raised with a manual lifting means to prevent inadvertent triggering of the stop bolt with a carpet cut out attached to the top of the door stop to hide the entire mechanism.
    Type: Grant
    Filed: May 21, 1980
    Date of Patent: August 10, 1982
    Assignee: Thunderbolt Corporation
    Inventor: John W. Steiner