Patents Assigned to Ener-Nat SA
  • Sunray captor
    Patent number: 4406279
    Abstract: Apparatus for stretching sheets of synthetic material across rigid frames, such as those used in sunray captors, are disclosed.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: September 27, 1983
    Assignee: Ener-Nat SA
    Inventor: Benjamin Kohli