Antonelli, Terry, Strout & Kraus, LLP
Optical information recording medium
 An optical information recording medium, which is not deteriorated after repeated reading out and writing in operations, is provided by forming a glass thin film, which varies the intensity or the intensity distribution of light, on a substrate, and providing a recording film, a protective film, and a reflecting film thereon. 
Hitachi, Ltd.
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Ken Takashi Toshimichi Hiroki Motoyasu Yasutaka Takashi
Takahashi Naito Shintani Yamamoto Terao Suzuki Namekawa