Title:
Interlocking wallboard
United States Patent 3274743
US Patent References:
Keyed insulating board
- - 1534142

Precast plaster-wall section
- - 1582721

Composition board
- - 1942946

Fastening panels that shrink
- - 2068098

Construction unit
- - 2107240


Inventors:
Blum Jr., Joseph Louis
Publication Date:
09/27/1966
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Assignee:
Blum Jr., Joseph Louis
Primary Class:
52/284
Other Classes:
52/592.100, 52/259, 52/506.050, 52/417, 52/366, 52/448, 52/539
International Classes:
E04F13/14
US Patent References:
2276071Panel construction
2305247Wallboard joint and method of joining wallboards
Foreign References:
FR1123293A