Patents by Inventor Wolfgang Schofl

Wolfgang Schofl 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).

  • Interengaging rings puzzle
    Patent number: 3970314
    Abstract: A plurality of rings of identical width and diameter, having a rectangular cross-section, include one solid ring and several split rings adapted to be assembled into a coplanar array. Each split ring is provided on each of its opposite faces with one or more generally radial grooves, each matingly engageable with a similar groove on one of the other rings, and also has a throughgoing slot accommodating the solid ring, the latter having a face formed with a groove for each of the remaining rings.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: July 20, 1976
    Assignee: Hermann Hansmann
    Inventors: Gert Michael Mayr, Wolfgang Schofl