Patents Assigned to Ferch & Nabben
  • Portable illuminated traffic light
    Patent number: 4253415
    Abstract: Roadway traffic and/or warning signs are provided with the construction thereof being such so as to provide flexible and/or pliable structures which are simultaneously lightweight for easy handling, but are of substantial strength. The signs of the invention are, preferably, comprised of molded polyurethane foam of integral structure which will give upon impact without damage, and will revert to their previous position once the forces causing the impact are removed.
    Type: Grant
    Filed: June 4, 1979
    Date of Patent: March 3, 1981
    Assignee: Ferch & Nabben
    Inventor: Alois Ferch