Building units and construction elements – Structure – Having angular roof
Patent
1985-01-09
1987-09-29
Word, A. Hugo
Building units and construction elements
Structure
Having angular roof
D25 30
Patent
active
D02921294
REFERENCES:
patent: D168771 (1953-02-01), Swanson
patent: D211781 (1968-07-01), Shamburg
patent: D231920 (1974-06-01), Thomas
Abitara, Jun. 1979, p. 81, Huts in lower right illustration.
Heartland Industries, Inc.
Word A. Hugo
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