Patents Assigned to John C. Jensen
  • Patent number: 5199717
    Abstract: A light weight boomerang toy having several blades of unique configuration extending from a central hub. Each blade has a straight or uniformly curved leading edge and a scalloped trailing edge. The trailing edge of each blade decreases in thickness from a line having a specific relationship to the blade centerline to provide improved lift and flight characteristics. While the blades are ordinarily coplanar with the hub and each other, they can be bent or the boomerang dished if desired to modify flight characteristics. For improved safety, and to permit use of the boomerang indoors, it preferably is formed from a closed cell synthetic resin foam.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: April 6, 1993
    Assignee: John C. Jensen
    Inventor: Harold C. Wimmer