Building units and construction elements – Structure – Having angular roof
Patent
1989-10-30
1992-07-21
Word, A. Hugo
Building units and construction elements
Structure
Having angular roof
D22 33
Patent
active
D03281370
REFERENCES:
patent: 473116 (1892-04-01), Hay
patent: 555067 (1896-02-01), Bemis
patent: 3386183 (1968-06-01), Reynolds
patent: 3987597 (1976-10-01), Smrt
patent: 4343117 (1982-08-01), Shemitz
patent: 4397122 (1983-08-01), Cros
patent: 4955146 (1990-09-01), Bollinger
Warren Russell D.
Womac Charles D.
Coles Doris V.
Hilbers L. F.
Word A. Hugo
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