Patents Assigned to Rolf C. Hagen Ltd.
  • Combined bird cage roof and bottom tray
    Patent number: D260306
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: August 18, 1981
    Assignee: Rolf C. Hagen Ltd.
    Inventors: Michael Biro, Hans Muckenfuss
  • Combined bird cage roof and bottom tray
    Patent number: D260565
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: September 1, 1981
    Assignee: Rolf C. Hagen Ltd.
    Inventors: Michael Biro, Hans Muckenfuss
  • Combined bird cage roof and bottom tray
    Patent number: D260566
    Type: Grant
    Filed: October 16, 1979
    Date of Patent: September 1, 1981
    Assignee: Rolf C. Hagen Ltd.
    Inventors: Michael Biro, Hans Muckenfuss