Patents by Inventor Eric Sigfrid Persson

Eric Sigfrid Persson 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).

  • Frame for supporting articles
    Patent number: 3944308
    Abstract: A frame for supporting articles comprises a plurality of bars which have angularly bent longitudinal portions and make angles with each other, some of the longitudinal portions extending in contiguous relation and being locked together by locking means engaging the channels in the bars.
    Type: Grant
    Filed: July 23, 1974
    Date of Patent: March 16, 1976
    Assignee: Expo Nord AB
    Inventor: Eric Sigfrid Persson