Patents by Inventor Nobuhiko Shimada

Nobuhiko Shimada 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).

  • Conical nib, method of manufacture of the same, and ceramic composite conical nib
    Patent number: 6652177
    Abstract: A highly durable conical nib is provided which also realizes a significant improvement in a nib productivity and a significant cost reduction. The conical nib comprises: a plurality of separated combtooth pieces being able to converge progressively toward front ends thereof and combine to form a virtually conical shape and that the front ends thereof combine to form a virtually spherical shape; a holding member capable of arranging the combtooth pieces along a circumference; and a converging member capable of converging these combtooth pieces; wherein the plurality of separated combtooth pieces are assembled by the holding member and the converging member, both separate from the combtooth pieces, into a conical nib having a writing tip at the front end thereof and an ink feeding path between each combtooth piece.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: November 25, 2003
    Inventors: Nobuhiko Shimada, Shizuo Yamanaka
  • Conical nib, method of manufacture of the same, and ceramic composite conical nib
    Publication number: 20030152415
    Abstract: A highly durable conical nib is provided which also realizes a significant improvement in a nib productivity and a significant cost reduction. The conical nib comprises: a plurality of separated combtooth pieces being able to converge progressively toward front ends thereof and combine to form a virtually conical shape and that the front ends thereof combine to form a virtually spherical shape; a holding member capable of arranging the combtooth pieces along a circumference; and a converging member capable of converging these combtooth pieces; wherein the plurality of separated combtooth pieces are assembled by the holding member and the converging member, both separate from the combtooth pieces, into a conical nib having a writing tip at the front end thereof and an ink feeding path between each combtooth piece.
    Type: Application
    Filed: November 27, 2002
    Publication date: August 14, 2003
    Applicant: Kazue Yamanaka
    Inventors: Nobuhiko Shimada, Shizuo Yamanaka