Patents by Inventor Moritami Okada

Moritami Okada 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).

  • Hole-burning material and production thereof
    Patent number: 4985226
    Abstract: A hole-burning material which comprises at least one hole which is formed on a zero-phonone line and semi-permanently lasts without suffering from any change in the temperature range from 2 to 120 K. and which can be erased by irradiation of excited light having an energy larger than the zero-phonone line, in which the burnt holes have long life and deep depth and any single holes can be erased.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: January 15, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Shuichi Satoh, Kazuwo Tsuji, Takeru Nakashima, Shuji Yazu, Yosio Nisida, Kiyofumi Muro, Yuzo Demizu, Masuo Nakagawa, Moritami Okada