Patent
   D447543
Priority
Mar 20 2000
Filed
Sep 07 2000
Issued
Sep 04 2001
Expiry
Sep 04 2015
Assg.orig
Entity
unknown
13
11
n/a
The ornamental design for a headwall structure for drainage conduit, as shown and described.

The FIGURE shown is a front, side perspective view of a headwall structure for drainage conduit showing my new design.

Quin, Donald S.

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Patent Priority Assignee Title
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2041267,
3779021,
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Dec 03 2003QUIN, DONALD S CIF COMPOSITES INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0147700200 pdf
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