Title:
DOUBLET GEM CONSTRUCTION
United States Patent 3528261
Inventors:
Jones, Harry S.
Publication Date:
09/15/1970
Export Citation:
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Assignee:
Jones, Harry S.
Primary Class:
63/32
Other Classes:
65/36, 65/61, 359/615
International Classes:
A44C17/00; A44C17/00; (IPC1-7): A44C17/00
View Patent Images:
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US Patent References:
2839841Instructional building blocks
2628156Optically glass-like material
0138314N/A
Foreign References:
FR560188A




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