Patents by Inventor Leif J. Ostberg

Leif J. Ostberg 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).

  • Shoe sole with wavy tread
    Patent number: D329131
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: September 8, 1992
    Assignee: Leif J. Ostberg, Inc.
    Inventor: Leif J. Ostberg
  • Shoe sole with deep hexagon tread
    Patent number: D329132
    Type: Grant
    Filed: February 21, 1991
    Date of Patent: September 8, 1992
    Assignee: Leif J. Ostberg, Inc.
    Inventor: Leif J. Ostberg