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E04C1/00—Building elements of block or other shape for the construction of parts of buildings
E—FIXED CONSTRUCTIONS
E04—BUILDING
E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
E04F17/00—Vertical ducts; Channels, e.g. for drainage
E04F17/02—Vertical ducts; Channels, e.g. for drainage for carrying away waste gases, e.g. flue gases; Building elements specially designed therefor, e.g. shaped bricks or sets thereof
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FR531794D1919-04-171921-03-09Perfectionnements aux blocs et pierres plates de construction ou autres équivalents
ExpiredFR531794A
(fr)
Perfectionnements apportés aux blocs destinés à la construction des fours à coke et aux parois ou constructions analogues établies au moyen de ces blocs