Patents by Inventor Kay F. Grosskopf

Kay F. Grosskopf 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).

  • Convertible coupon or label
    Patent number: 5106124
    Abstract: A convertible coupon is usable as a single primary coupon or as a plurality of secondary coupons that are attachable to selected items. The secondary coupons are separable portions of the primary coupon so use of any of them visibly destroys the integrity of the primary coupon to prevent fraud. Several preferred embodiments show various applications and ways of attaching the primary and secondary coupons to one another and to products.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: April 21, 1992
    Assignee: Menasha Corporation
    Inventors: James B. Volkman, David A. Wollangk, Kay F. Grosskopf, Eugene E. Dul