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Haruo Hirakawa
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Kudamatsu, JP
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last 30 patents
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Patent Grant
Methods and apparatus for ventilating carriages
Patent number
5,263,894
Issue date
Nov 23, 1993
Hitachi, Ltd.
Haruo Hirakawa
B61 - RAILWAYS
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Patent Grant
Ventilating equipment for railway rolling stock and operating metho...
Patent number
5,137,490
Issue date
Aug 11, 1992
Hitachi, Ltd.
Shinichirou Ishikawa
B61 - RAILWAYS