Building units and construction elements – Structure – Fully enclosed
Patent
1990-10-29
1993-08-24
Word, A. Hugo
Building units and construction elements
Structure
Fully enclosed
Patent
active
D03387178
REFERENCES:
patent: 722781 (1903-03-01), Weary
patent: 2156859 (1939-05-01), Lowe
patent: 2278956 (1942-04-01), Wagner
patent: 4259816 (1981-04-01), Bergquist
patent: 4598515 (1986-07-01), Diana
Genca Samuel R.
Mortimor Paula A.
Word A. Hugo
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