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Featured researches published by Reiji Hirano.


Archive | 1983

The Design of an Open View Autorefractometer

Isao Matsumura; Shigeo Maruyama; Yasuyuki Ishikawa; Reiji Hirano; Kazunobu Kobayashi; Yoshimi Kohayakawa

Remarkable progress has been made in the design of automatic refractometers, particularly because of advances in electronics and microcomputers. Various types of automatic refractometers incorporating the advanced technologies have been introduced and they have increased the demand for an instrument that enables us to measure refraction with high reliability.


Archive | 1993

Printing control device

Reiji Hirano; Takayoshi Hanakata; Matsutoshi Ito


Archive | 1980

Apparatus for measuring the refractive power of the eye

Isao Matsumura; Yasuyuki Ishikawa; Shigeo Maruyama; Reiji Hirano; Yoshimi Kohayakawa


Archive | 1979

Automatic eye-refractometer

Isao Matsumura; Yasuyuki Ishikawa; Shigeo Maruyama; Reiji Hirano; Yoshimi Kohayakawa


Archive | 1980

Auto eye-refractometer

Isao Matsumura; Yasuyuki Ishikawa; Reiji Hirano; Shigeo Maruyama; Yoshimi Kohayakawa


Archive | 1991

Method and apparatus for alignment and exposure

Kazuhito Isobe; Reiji Hirano


Archive | 1977

Electronic equipment capable of arithmetic operations

Shinichi Nakata; Reiji Hirano


Archive | 1972

DISPLAY DEVICE FOR USE IN A DESK TOP CALCULATOR

Reiji Hirano; Junichi Ishiwata; Matsutoshi Ito


Archive | 1981

Electronic calculator capable of dealing with variables

Reiji Hirano; Shinichi Nakata


Archive | 1981

Calculator capable of calculating with additional externally instructed units

Shinichi Nakata; Hiroshi Takahashi; Shigeru Matsuyama; Reiji Hirano

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