Two-sided manhole step

Details Two-sided manhole step Two-sided manhole step

2003-07-17

2004-06-01

Clark, Doris (Department: 2914)

Building units and construction elements

Stair, ladder, scaffold, or similar support

Element or attachment

Design Patent

active

D0490907

CLAIM:
The ornamental design for a two-sided manhole step, as shown and described.

REFERENCES:
patent: D304376 (1989-10-01), Robertson
patent: D452742 (2002-01-01), Takahashi

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