Patents by Inventor Helmut Kuhlenkamp

Helmut Kuhlenkamp 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).

  • Reflection-reduced, bondable stretched film as window film for envelopes
    Patent number: 5521004
    Abstract: The present invention relates to a stretched, multilayer, transparent film which is reflection-reduced on at least one side, consists predominantly of polypropylene and is very suitable as window film for envelopes.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: May 28, 1996
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Ulrich Reiners, Anton Krallmann, Neele Neelen, Helmut Kuhlenkamp