Patents by Inventor Norman D. Siegfried

Norman D. Siegfried 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).

  • Stackable stamps
    Patent number: 5909709
    Abstract: A stackable stamp assembly used to form images on a surface includes a substantially congruent and releasably engageable base, intermediate members, and cover assembly. A stamp is attached to each of the intermediate members. The intermediate members are dish-shaped so that the stamp of an upper member is received within the member disposed immediately below when the members are stacked one on top of the other. The assembly may also includes ways to facilitate the alignment of the assembly with the surface on which an imprint of the stamp is to be made.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: June 8, 1999
    Assignee: Fiskars Inc.
    Inventors: Suk Ku An, Norman D. Siegfried, Brian L. Adkinson