PANEL UNIT AND FRAME
United States Patent 3455079
US Patent References:
/0752283.html
- - 0752283

Kalamein door
- - 1771304

Metallic window sash
- - 2589729

Shutter construction and method of making the same
- - 3055467

Structural panel
- - 3287854


Inventors:
Frederick, Eugene O.
Publication Date:
07/15/1969
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Assignee:
IOWA PLASTICS ENG INC
Primary Class:
52/473
Other Classes:
52/656.800, 52/798.100, 52/656.700
International Classes:
E06B9/04; E06B9/02; E06B9/02; E06B7/08
US Patent References:
3355204Interlocking joints for panel frames
3364643Frame and mullion assembly and method of making same
Foreign References:
FR1155085A
FR1341673A
GB924493A




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