Patents Assigned to Per Gunnar Ronn AB
  • Arrangement for raising and lowering a vertically suspended unit
    Patent number: 5379977
    Abstract: The invention relates to an arrangement for vertically raising and lowering a unit, e.g.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: January 10, 1995
    Assignee: Per Gunnar Ronn AB
    Inventors: Per G. Ronn, Leif Svedberg