Building units and construction elements – Stair – ladder – scaffold – or similar support – Element or attachment
Design Patent
2011-08-02
2011-08-02
Clark, Doris (Department: 2914)
Building units and construction elements
Stair, ladder, scaffold, or similar support
Element or attachment
Design Patent
active
D0642702
CLAIM:
The ornamental design for a tread cover, as shown and described.
REFERENCES:
patent: 1446382 (1923-02-01), Dwight
patent: D258839 (1981-04-01), Broyles
patent: 4261436 (1981-04-01), Stillman, Jr.
patent: 4442920 (1984-04-01), Gronbeck et al.
patent: 4766664 (1988-08-01), Benedyk
Clark Doris
Dutkiewicz Edward P
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