Patents Assigned to Grace Petroleum Corporation
  • Security Device
    Patent number: 4540322
    Abstract: The security device consists of a bolt portion and/or a bolt fastener portion which utilize nuts which do not threadedly engage any other part, but give the impression that they do so and that they are the fastening means. These nuts turn freely as if stripped if an unauthorized person attempts to remove them.
    Type: Grant
    Filed: January 13, 1983
    Date of Patent: September 10, 1985
    Assignee: Grace Petroleum Corporation
    Inventor: Bob J. Coffia