Building units and construction elements – Structure
Patent
1990-12-14
1993-01-19
Word, A. Hugo
Building units and construction elements
Structure
D21 93
Patent
active
D03326659
REFERENCES:
patent: D139343 (1944-11-01), Temlitz
patent: D218466 (1970-08-01), Fier, Jr. et al.
patent: 742032 (1903-10-01), Johnson
patent: 1093062 (1914-04-01), Mellinger
patent: 1593078 (1926-07-01), Jacobs
patent: 2533110 (1950-12-01), Harbert
patent: 4204271 (1980-05-01), Braly
patent: 4316096 (1982-02-01), Syverson
Gilden Leon
Mortimer Paula A.
Word A. Hugo
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