Patents by Inventor Gijsbertus Attema

Gijsbertus Attema 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).

  • Electrical ducting system
    Patent number: 4493516
    Abstract: A ducting system comprising ducts of mainly U-shaped cross-section with bare hollow conductors fitted at the inner surfaces thereof, which conductors are accessible for corresponding contact pins of a contact element to be locked in arbitrary points on the open side of a duct, auxiliary parts being used for interconnecting such ducts and connecting a duct with a current supply.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: January 15, 1985
    Inventor: Gijsbertus Attema