Patents by Inventor Jan Berkheij

Jan Berkheij 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).

  • Radio pager
    Patent number: D305428
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: January 9, 1990
    Assignee: Ericsson Paging Systems B.V.
    Inventor: Jan Berkheij
  • Radio pager
    Patent number: D305429
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: January 9, 1990
    Assignee: Ericsson Paging Systems B.V.
    Inventor: Jan Berkheij
  • Radio pager
    Patent number: D307012
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: April 3, 1990
    Assignee: Ericsson Paging Systems B.V.
    Inventor: Jan Berkheij