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Title:
【発明の名称】スパーブイ型ボーリング櫓用沈錘
Document Type and Number:
Japanese Patent JPH07107349
Kind Code:
B2
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Inventors:
Yuji Aso
Mikio Fukutomi
Mitsuaki Yokomine
Tsuneaki Iwasaki
Nakazawa Hitoshi
Arimura Tadahiro
Junichi Harada
Application Number:
JP13192391A
Publication Date:
November 15, 1995
Filing Date:
May 08, 1991
Export Citation:
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Assignee:
Zeni Light Buoy Co., Ltd.
Applied Geology Co., Ltd.
International Classes:
B63B22/04; E21B7/12; E21B15/02; (IPC1-7): E21B7/12; B63B22/04; E21B15/02
Domestic Patent References:
JP5876688A
JP63190392U
Attorney, Agent or Firm:
Susumu Fukuda (1 person outside)



 
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