Patents by Inventor Bahiru Kassahun

Bahiru Kassahun 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).

  • Apparatus for coating lightguide fiber
    Patent number: 4522148
    Abstract: A coating material is applied to drawn lightguide fiber in a manner which substantially prevents the inclusion of bubbles and which causes the fiber to be disposed substantially concentrically within the coating layer. The lightguide fiber is advanced through a continuum of coating material, which extends from a free surface of a reservoir and through two dies that are arranged in tandem, at a velocity which causes air to be entrained in the coating material. A pressure gradient is established between portions of the first die adjacent to its exit orifice. A first one of the dies communicates with the reservoir and the second die and further communicates at the interface of the dies with a pressurized supply of the coating material.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: June 11, 1985
    Assignee: AT&T Technologies, Inc.
    Inventors: Bahiru Kassahun, Montri Viriyayuthakorn
  • Methods of coating lightguide fiber and product produced thereby
    Patent number: 4439467
    Abstract: A coating material is applied to drawn lightguide fiber in a manner which substantially prevents the inclusion of bubbles and which causes the fiber to be disposed substantially concentrically within the coating layer. The lightguide fiber is advanced through a continuum of coating material, which extends from a free surface of a reservoir and through two dies that are arranged in tandem, at a velocity which causes air to be entrained in the coating material. A pressure gradient is established between portions of the first die adjacent to its exit orifice. A first one of the dies communicates with the reservoir and the second die and further communicates at the interface of the dies with a pressurized supply of the coating material.
    Type: Grant
    Filed: September 15, 1982
    Date of Patent: March 27, 1984
    Assignee: Western Electric Company, Inc.
    Inventors: Bahiru Kassahun, Montri Viriyayuthakorn