Patents by Inventor Wolfgang Landrichter

Wolfgang Landrichter 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).

  • Method and device for laying an underground duct made of a plastic material
    Patent number: 6565285
    Abstract: For laying synthetic underground piping (1) a ground channel (2) is first bored and the piping (1) is introduced into the ground channel (2). To facilitate laying an underground pipe length particularly effectively, the pipe length (1) comprising a hardening synthetic mass is manufactured at the same time as it is introduced into the ground channel (2) by the prepared synthetic mass being formed continuously inside the ground channel (2) as a run of piping (3) and left to harden.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: May 20, 2003
    Inventor: Wolfgang Landrichter