Air curtain
United States Patent 3190207
US Patent References:
/0774730.html
- - 0774730
/0983877.html
- - 0983877
Method for making high temperature refractories
- - 2241354
Fluid film closure for building entrances and exits
- - 2516432
Method and apparatus for ventilating laboratory fume hoods
- - 3021776
/0774730.html
- - 0774730
/0983877.html
- - 0983877
Method for making high temperature refractories
- - 2241354
Fluid film closure for building entrances and exits
- - 2516432
Method and apparatus for ventilating laboratory fume hoods
- - 3021776
Inventors:
Dan, Weisz
Publication Date:
06/22/1965
View Patent Images:
Export Citation:
Assignee:
P J MAC INC
Primary Class:
Other Classes:
454/192
International Classes:
F24F9/00; F24F13/06
Foreign References:
| DE971345C | ||||
| GB481991A | ||||
| GB872601A | ||||
| IT567039B |