Patents by Inventor Junzo Tanbaka

Junzo Tanbaka 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).

  • Light emitting element of cubic boron nitride
    Patent number: 4980730
    Abstract: A method for growing a single crystal of a cubic boron nitride semiconductor in a growing container sealed under high pressure and high temperature conditions, which comprises dissolving in a dopant-containing boron nitride solvent a boron nitride starting material placed at a high temperature zone in the growing container, and providing a temperature gradient to the solvent so that the temperature dependence of the solubility is utilized to let the single crystal form and grow at a low temperature zone in the growing container.
    Type: Grant
    Filed: August 3, 1989
    Date of Patent: December 25, 1990
    Assignee: National Institute for Research in Organic Materials
    Inventors: Osamu Mishima, Shinobu Yamaoka, Osamu Fukunaga, Junzo Tanbaka, Koh Era