Ventilating system for dry closets and septic tanks
United States Patent 2520657
US Patent References:
/0170967.html
- - 0170967

/0192096.html
- - 0192096

/0649239.html
- - 0649239

Sanitary closet
- - 1415719


Inventors:
Percy, Reid William Henry
Publication Date:
08/29/1950
View Patent Images:
Download PDF 2520657 pdf       PDF help
Export Citation:
Click for automatic bibliography generation
Assignee:
ROEC PROPRIETARY LTD
Primary Class:
4/475
Other Classes:
4/218, 4/DIG.012
Foreign References:
GB186600898A
IT345067B