Building units and construction elements – Structure – Having curved or vaulted roof
Patent
1975-03-27
1976-12-14
Word, A. Hugo
Building units and construction elements
Structure
Having curved or vaulted roof
D2503
Patent
active
D02427117
REFERENCES:
patent: 3009391 (1961-11-01), Zagieboylo et al.
patent: 3134906 (1964-05-01), Henker
patent: 3254643 (1966-06-01), Thomason
patent: 3469902 (1969-09-01), Mertz
National Geographic, Mar. 1976, p. 384.
AAI Corporation
Pippin, Jr. Reginald F.
Word A. Hugo
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