Assignee
HANEDA HUMEPIPE CO LTD
JP·2 granted patents·61 citations·filing 2000–2000
Top patents by PatentIndex Score
2 records- 0178US6435763B1Key hole insertion for manhole and manhole cover locking apparatus equipped with the key hole insertion and manhole cover locking system and unlocking method and manhole cover opening and closing control systemHANEDA HUMEPIPE CO LTD·Filed 2000·Granted Aug 20, 2002·31 cites·16 claims
- 0268US6346670B1Solar battery systemHANEDA HUMEPIPE CO LTD·Filed 2000·Granted Feb 12, 2002·30 cites·15 claims
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