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E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
E01C9/00—Special pavings; Pavings for special parts of roads or airfields
E01C9/001—Paving elements formed in situ; Permanent shutterings therefor ; Inlays or reinforcements which divide the cast material in a great number of individual units
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FR728872D1931-02-241931-12-28
Improvements in methods of constructing roads, areas, walls, foundations or other constructions of concrete or the like
ExpiredFR728872A
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