Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1988-09-23
1990-07-24
Word, A. Hugo
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
D 8323
Patent
active
D03095029
REFERENCES:
patent: 4602889 (1986-07-01), Mu-Shan
patent: 4666327 (1987-05-01), Su
patent: 4824278 (1989-04-01), Chang
Cluff Kenneth C.
Wing Harold R.
Clark Doris
Wing Enterprises, Inc.
Word A. Hugo
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