Inventor · disambiguated record
Haruo Hirakawa
Also filed as: HIRAKAWA HARUO
3 granted patents·31 citations·filing 1991–2000
69Inventor score
Files withHITACHI LTD3
Top patents by PatentIndex Score
3 records- 0147US5263894AMethods and apparatus for ventilating carriagesHITACHI LTD·Filed 1992·Granted Nov 23, 1993·14 cites·20 claims
- 0244US5137490AVentilating equipment for railway rolling stock and operating method thereofHITACHI LTD·Filed 1991·Granted Aug 11, 1992·13 cites·13 claims
- 0342US6638036B1Method of manufacturing ventilating device and the ventilating deviceHITACHI LTD·Filed 2000·Granted Oct 28, 2003·4 cites·31 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →