Patents by Inventor Toshiro Futagi

Toshiro Futagi 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 with employment of porous silicon and optical device utilizing light emitting element
    Patent number: 5285078
    Abstract: A carrier injection type light emitting element with employment of a pn junction established between porous silicon and a semiconductor having a conductivity type different from that of the porous silicon, and also optical devices such as an opto-optical converting element, a light transmitting element, a photocoupling circuit element, a photocoupling element and a display apparatus, which comprise such a carrier injection type light emitting element and a semiconductor light receiving element.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: February 8, 1994
    Assignee: Nippon Steel Corporation
    Inventors: Hidenori Mimura, Toshiro Futagi, Takahiro Matsumoto