Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Patent
1999-08-05
2000-08-01
Clark, Doris
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
2504
Patent
active
D0429002&
REFERENCES:
patent: D304376 (1989-10-01), Robertson
patent: 4869342 (1989-09-01), Borst
Clark Doris
Miyama Kogyo Co., Ltd.
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