マンホールジョイント

Title:

マンホールジョイント

Document Type and Number:

Japanese Patent JP3990039

Kind Code:

B2

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Inventors:

Takuji Tsunoda
Arai Shunichi
Tsuneo Okamura

Application Number:

JP21335798A

Publication Date:

October 10, 2007

Filing Date:

July 29, 1998

Export Citation:

Assignee:

CK Corporation

International Classes:

E02D29/12; F16L5/02; F16L19/04; F16L21/02; F16L27/10

Domestic Patent References:

Attorney, Agent or Firm:

Keisuke Watanabe
Yoshihiro Yamaguchi

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