Patents by Inventor Ingemar Fredriksson

Ingemar Fredriksson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Bridge arrangement
    Patent number: 4722108
    Abstract: A temporary or permanent bridge is constructed to enable transportation across a waterway. In wartime such a bridge constitutes a bombing target. The object of the present invention is to draw attention to said bridge by creating one or more false bridges one beside the other, each consisting of a frame provided with floating elements (11,16,19 and 22) and a covering layer (23) which, seen from above, give the impression of a roadway.
    Type: Grant
    Filed: February 27, 1987
    Date of Patent: February 2, 1988
    Assignee: Fredriksson & Ribring AB
    Inventor: Ingemar Fredriksson
  • Device for supplying treatment agent to ligno-cellulose containing material
    Patent number: 3942729
    Abstract: Meterial to be ground, such as ligno-cellulose containing material, is fed-in centrally between a pair of juxtaposed relatively rotatable discs. The material being ground moves outwardly towards a discharge point adjacent the periphery of the discs, and a fluidized treatment agent is supplied to the material as it is discharged from between the discs, the treatment agent issuing from an array of circumferentially spaced nozzles which surround the periphery of the discs.
    Type: Grant
    Filed: September 5, 1973
    Date of Patent: March 9, 1976
    Assignee: SCA Projekt Aktiebolag
    Inventor: Borje Ingemar Fredriksson