Air sluice chamber
United States Patent 3314198
US Patent References:
/0051345.html
- - 0051345

Inflatable inclosure
- - 2910994

Paraffin scraper combination
- - 2997106


Inventors:
Per, Frisk Karl
Publication Date:
04/18/1967
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Assignee:
LICENTIA EKMAN & BRUNDIN
Primary Class:
52/2.140
Other Classes:
49/386, 49/366, 49/68
International Classes:
E04H15/22; E04H15/20
Foreign References:
DE206245C