Building units and construction elements – Prefabricated unit – Finishing unit
Patent
1987-04-02
1988-12-20
Word, A. Hugo
Building units and construction elements
Prefabricated unit
Finishing unit
D25116
Patent
active
D02990679
REFERENCES:
patent: D237704 (1975-11-01), Lane
patent: 2882689 (1959-04-01), Huch et al.
patent: 4014693 (1977-04-01), Warren
patent: 4312606 (1982-01-01), Sarikells
patent: 4496266 (1985-01-01), Ruckstuahl
patent: 4658541 (1987-04-01), Haile
Keystone Retaining Wall & Systems, Inc.
Word A. Hugo
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