Title:
貫通ダクトとその貫通ダクトを用いた中空壁のダクト構造
Document Type and Number:
Japanese Patent JP4863986
Kind Code:
B2
Inventors:
Arai Akio
Application Number:
JP2007329563A
Publication Date:
January 25, 2012
Filing Date:
December 21, 2007
Export Citation:
Assignee:
Arai Akio
International Classes:
F24F13/02; E04F17/08; F16L5/00
Domestic Patent References:
| JP4181088A | ||||
| JP5870581U | ||||
| JP200590888A | ||||
| JP2007321967A | ||||
| JP6053294A | ||||
| JP2006274643A |
Foreign References:
| DE19547268A1 | ||||
| US4625940 |
Attorney, Agent or Firm:
Toshio Hirayama