|
US2997269A
|
|
Adjustable shelving system
|
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US2987832A
|
|
Blackboard setting system
|
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US2822584A
|
|
Suspended ceiling construction
|
|
US2763937A
|
|
Chalk trough
|
|
US2679700A
|
|
Portable display board construction
|
|
US2651852A
|
|
Blackboard supporting structure
|
|
US2601184A
|
|
Transportation container
|
|
US2540603A
|
|
Clip construction for means for assembling constructional units
|
|
US2389171A
|
|
Means for assembling construction units
|
|
US2338146A
|
|
Chalk trough
|
|
US2382456A
|
|
Wall or ceiling covering
|
|
US2239433A
|
|
Adjustable shim
|
|
US2340911A
|
|
Means for assembling construction units
|
|
US2319278A
|
|
Display board construction
|
|
US2285632A
|
|
Storage rack
|
|
US2129976A
|
|
Clip and channel
|
|
US2129975A
|
|
Acoustical tile clip
|
|
US2116737A
|
|
System for laying boards
|
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CA422984A
|
|
Display board
|
|
CA367425A
|
|
Flooring system
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