Patents by Inventor Johannes Fredericus Spronk, deceased

Johannes Fredericus Spronk, deceased 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).

  • Three dimensional contour surface box
    Patent number: 5797543
    Abstract: The invention relates to a method wherein on at least one side of the cardboard in the at least one wall panel (1), a number of creases (2, 3, 4) are provided in the cardboard through a die-cutting or pressing operation, which creases (2, 3, 4) are at least locally slightly spaced apart and extend parallel to each other at that location. The invention also relates to a box manufactured by means of the method according to the invention and to a die-cutting apparatus for carrying out the method according to the invention to provide a blank for a box according to the invention.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: August 25, 1998
    Inventors: Johannes Fredericus Spronk, deceased, by Anna Dik, administratrix