Patents by Inventor John Ingerdahl

John Ingerdahl 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).

  • Patent number: 4024659
    Abstract: An adjustable picture frame comprising a plurality of inner and outer frame members telescopically displaceable with respect to each other. Each frame member has a front wall, two opposed sidewalls and a back wall. The picture frame has an arresting stud with rounded cam surfaces mounted within each inner frame member so as to project through an opening formed in one side wall thereof and a spring member urges the arresting stud to bear against the adjacent side wall of the associated outer frame member. At least two longitudinally spaced openings are formed in the adjacent side wall for receiving the arresting stud to thereby releasably hold the inner and outer frame members in a predetermined relative position. A blocking stud is mounted within each inner frame member so as to project through an opening formed in the side wall thereof opposite to said first side wall.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: May 24, 1977
    Assignee: I/S Biodan
    Inventor: John Ingerdahl