Patents by Inventor Henricus Johannes Bernhardus Olthof

Henricus Johannes Bernhardus Olthof 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 part for a ventilating fan
    Patent number: 6499947
    Abstract: Disclosed is a housing part for a ventilating fan with an axial rotation shaft. A number of housing parts can be placed radially around the ventilating fan so as to form a substantially cylindrical housing. The housing part includes an inner wall; an outer wall placed at a distance from the inner wall; and connecting walls extending between the inner wall and the outer wall. The inner wall, outer wall and the connecting walls define a closed space.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: December 31, 2002
    Assignee: Ventilatoren Sirocco Howden B.V.
    Inventor: Henricus Johannes Bernhardus Olthof
  • Housing part for a ventilating fan
    Publication number: 20010021345
    Abstract: The invention relates to a housing part for a ventilating fan with an axial rotation shaft, wherein a number of housing parts can be placed radially round the ventilating fan so as to form a substantially cylindrical housing, which housing part comprises:
    Type: Application
    Filed: January 4, 2001
    Publication date: September 13, 2001
    Inventor: Henricus Johannes Bernhardus Olthof