Headwall structure for drainage conduit

Details Headwall structure for drainage conduit Headwall structure for drainage conduit

2000-09-07

2001-09-04

Taylor, Robin V. (Department: 2911)

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

Design Patent

active

D0447543

CLAIM:
The ornamental design for a headwall structure for drainage conduit, as shown and described.

REFERENCES:
patent: D. 180410 (1957-06-01), Mowbrav
patent: D. 277696 (1985-02-01), Doman et al.
patent: D. 292934 (1987-11-01), Alberico
patent: D. 379850 (1997-06-01), Nelson
patent: 1620089 (1927-03-01), Fischer
patent: 2041267 (1936-05-01), Schroeder
patent: 3779021 (1973-12-01), Green
patent: 4723871 (1988-02-01), Roscoe
patent: 4993872 (1991-02-01), Lockwood
patent: 5836717 (1998-11-01), Bernini
patent: 5971663 (1999-10-01), Brothers
Langley Concrete Group, Type II Headwall Structure, Specifications Drawing, Nov. 1998, 1 page, Victoria, Canada.
Langley Concrete Group, 16-20 Headwall Structure, Specifications Drawing, Nov. 1998, 1 page,Victoria, Canada.

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