Title:
マンホールと下水本管との接続構造
Document Type and Number:
Japanese Patent JP4887211
Kind Code:
B2
Inventors:
Norio Otsuka
Application Number:
JP2007125375A
Publication Date:
February 29, 2012
Filing Date:
May 10, 2007
Export Citation:
Assignee:
Sanritsu Co., Ltd.
International Classes:
E02D29/12; E03F5/02
Domestic Patent References:
| JP2003090077A | ||||
| JP11182760A | ||||
| JP2003268794A | ||||
| JP3955078B1 | ||||
| JP2008255581A | ||||
| JP7054353Y2 |
Attorney, Agent or Firm:
Kenji Ishiguro