Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1988-10-19
1990-04-24
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
D25 61
Patent
active
D03074803
REFERENCES:
patent: D249459 (1978-09-01), Halliwell
patent: 4044523 (1977-08-01), Layhes
patent: 4065220 (1977-12-01), Ruga
patent: 4551960 (1985-11-01), Fleishman
patent: 4587786 (1986-05-01), Woods
patent: 4806041 (1989-02-01), Chamayouditfelix
Anthes Industries Inc.
Clark Doris
Word A. Hugo
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