Patents by Inventor Wouter M. van den Burg

Wouter M. van den Burg 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).

  • Two-piece lock for securing polymeric sheeting over greenhouses
    Patent number: 4665670
    Abstract: An improved two-piece lock for securing polymeric sheeting for use in covering greenhouses. The lock has an elongated lower member affixed to the frame of the greenhouse and one or more layers of polymeric sheeting are held in the lock between the lower member and an upper member. The upper member has two downwardly extending bars one of which fits into a channel of the lower member and the other of which abuts a concave contact bar of the lower member which faces the channel.
    Type: Grant
    Filed: July 19, 1985
    Date of Patent: May 19, 1987
    Inventor: Wouter M. van den Burg