Building units and construction elements – Structure
Patent
1991-06-19
1993-06-01
Word, A. Hugo
Building units and construction elements
Structure
D25 16, D25 56
Patent
active
D03361365
REFERENCES:
patent: D222441 (1971-10-01), Sklaar
patent: D227455 (1973-06-01), Sklaar
patent: D250836 (1979-01-01), LaHaie
patent: D258765 (1981-03-01), Kinnebrew, IV
patent: D294300 (1988-02-01), Hoecterhoff et al.
patent: 3762109 (1973-10-01), Cohen
patent: 4018016 (1977-04-01), Zale
Coles Doris V.
Street Equipment Ltd.
Word A. Hugo
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