Rubber-coated plywood for roadbed on highways
United States Patent 2737092

Inventors:
Gramelspacher, Clarence U.
Publication Date:
03/06/1956
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Assignee:
Gramelspacher, Clarence U.
Primary Class:
International Classes:
E01C3/06; E01C5/22; E01C3/00; E01C5/00
US Patent References:
2199700Rubber coated plywood for road material
2294247Surface covering
2315588Top seal for pavement joints
2420833Railway roadbed