Patents by Inventor Henry A. Holzwarth

Henry A. Holzwarth 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: 3963172
    Abstract: A one-piece molded egg carton of the type having a tray-like bottom section with two parallel rows of downwardly dished egg receiving pockets, two articulated trough-shaped cover sections integrally hinged to the opposite sides of the bottom section for closing up and over the rows of pockets filled with eggs to provide a substantially uninterrupted flat upper cover surface for displaying advertising information and/or content information. The two cover sections are locked in the closed position by male locking projections which positively engage female locking ledges provided by apertures in the bottom section between the rows of egg pockets. A series of window openings are provided on each side of the carton for viewing the contents of all the egg pockets without opening the carton.
    Type: Grant
    Filed: March 24, 1975
    Date of Patent: June 15, 1976
    Assignee: Keyes Fibre Company
    Inventors: Henry A. Holzwarth, John D. Wark