Building units and construction elements – Stair – ladder – scaffold – or similar support – Stepped
Design Patent
2001-09-24
2002-04-30
Clark, Doris (Department: 2914)
Building units and construction elements
Stair, ladder, scaffold, or similar support
Stepped
Design Patent
active
D0456525
CLAIM:
The ornamental design for an extension ladder with slip guards, as shown and described.
REFERENCES:
patent: D238298 (1975-12-01), Larson
patent: 5924523 (1999-07-01), Krause
Lear Margaret
Lear Steven
Lear Terry
Clark Doris
Goldstein Law Offices P.C.
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