Patents by Inventor Charles F. Zens

Charles F. Zens 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: 4172456
    Abstract: A full-length, anti-embolism stocking extends over a wearer's leg and is adapted to exhibit a controlled, graduated compressive force on the leg. The compressive force is greatest in the ankle area and diminishes over the length of the stocking to a minimum at the top. Three distinct and defined sections make up the stocking, a lower section covering the calf and foot has a one-way stretch in a circumferential direction, an upper section covering the thigh also has a one-way stretch in a circumferential direction, and an intermediate section covering the knee has a two-way stretch. The knee and calf-foot sections comprise a fabric formed with a jersey stitch incorporating an elastomeric yarn. In the knee section the elastomeric yarn is knit-in to provide the two-way stretch and in the calf-foot section it is laid-in to provide only a one-way, circumferential stretch.
    Type: Grant
    Filed: July 2, 1976
    Date of Patent: October 30, 1979
    Assignee: Zens Hosiery Mgf. Co., Inc.
    Inventor: Charles F. Zens