A surfacing prevention construction method of a manhole

Title:

A surfacing prevention construction method of a manhole

Document Type and Number:

Japanese Patent JP6249440

Kind Code:

B2

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Inventors:

Shinkichi Ooka
Yasuhiko Konishi
Tsune Kitajima
Zhang Manra

Application Number:

JP2013271069A

Publication Date:

December 20, 2017

Filing Date:

December 27, 2013

Export Citation:

Assignee:

Toa Grout Industry Co., Ltd.

International Classes:

E02D29/12; E02D31/12

Domestic Patent References:

Foreign References:

WO2002066753A1

Attorney, Agent or Firm:

Nakagawa International Patent Office

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