Title:
Air curtain for observation window
United States Patent 3387551
US Patent References:
Process for tinting art objects
- - 2977635
Protecting device for window of optical housing
- - 2896854
Air curtains
- - 3282193
Process for tinting art objects
- - 2977635
Protecting device for window of optical housing
- - 2896854
Air curtains
- - 3282193
Inventors:
Hughes, David E.
Publication Date:
06/11/1968
View Patent Images:
Export Citation:
Assignee:
PITTSBURGH PLATE GLASS CO
Primary Class:
Other Classes:
454/188, 65/158, 65/32.200, 239/105, 74/566, 65/339, 65/182.100
International Classes:
C03B5/42; C03B18/16; E06B7/28; C03B5/00; C03B18/00; E06B7/00