Patents Assigned to Hisao Watarai
  • Recording medium
    Patent number: 4636806
    Abstract: A recording medium is disclosed, which comprises as the main component an amorphous lead oxide or a lead oxide at the metastable state, having the formula of PbL.sub.x M.sub.y O.sub.z wherein L and M each indicate elements other than Pb and O. The recording mediums are drastically changed in their electrical properties and optical properties by application of heat, due to the characteristics inherent in the main component, and such changes make the recording medium highly useful for recording by laser light or heat.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: January 13, 1987
    Assignees: Research Development Corporation of Japan, Hisao Watarai, Masahiro Tanaka, Shuji Masuda, Kenji Suzuki, Tsuyoshi Masumoto
    Inventors: Hisao Watarai, Masahiro Tanaka, Shuji Masuda, Kenji Suzuki, Tsuyoshi Masumoto