Drainage tile

Details Drainage tile Drainage tile

2006-02-21

2006-02-21

Delehanty, Robert A. (Department: 2914)

Building units and construction elements

Architectural stock material

Construction block or brick type

Design Patent

active

D0515709

CLAIM:
The ornamental design for a drainage tile, as shown and described.

REFERENCES:
patent: 3854292 (1974-12-01), Nienstadt
patent: D270189 (1983-08-01), Khoo
patent: 4661023 (1987-04-01), Hilfiker
patent: D299069 (1988-12-01), Risi et al.
patent: D305938 (1990-02-01), Risi et al.
patent: D387109 (1997-12-01), Winans
patent: 6457911 (2002-10-01), Scales et al.
patent: 6698977 (2004-03-01), Charon
patent: 6817807 (2004-11-01), Charon

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