Patents Assigned to Christianson Manufacturing Corporation
  • Double action umbrella
    Patent number: 4523601
    Abstract: A device is disclosed whereby both the opening and the closing of a device commonly known as an umbrella is accomplished automatically.
    Type: Grant
    Filed: May 8, 1983
    Date of Patent: June 18, 1985
    Assignee: Christianson Manufacturing Corporation
    Inventors: Clyde C. Grady, Clyde C. Grady, II