Patents by Inventor John A. Hellwig

John A. Hellwig 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).

  • Housing for telecommunications apparatus
    Patent number: D264845
    Type: Grant
    Filed: April 14, 1980
    Date of Patent: June 8, 1982
    Assignee: Northern Telecom Limited
    Inventor: John A. Hellwig
  • End gable
    Patent number: D425337
    Type: Grant
    Filed: September 5, 1997
    Date of Patent: May 23, 2000
    Assignee: Teknion Furniture Systems
    Inventors: John A. Hellwig, Steve O. Verbeek, Genadij P. Makarewicz