Patents by Inventor Petrus Jacobus J. Nagelkerke

Petrus Jacobus J. Nagelkerke 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).

  • Dry shaver
    Patent number: D270487
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: September 6, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Petrus Jacobus J. Nagelkerke, Klaas T. Oord
  • Hair dryer
    Patent number: D274153
    Type: Grant
    Filed: July 9, 1982
    Date of Patent: June 5, 1984
    Assignee: U.S. Philips Corporation
    Inventor: Petrus Jacobus J. Nagelkerke
  • Dry shaver
    Patent number: D276275
    Type: Grant
    Filed: April 9, 1982
    Date of Patent: November 6, 1984
    Assignee: U.S. Philips Corporation
    Inventor: Petrus Jacobus J. Nagelkerke