Precast concrete bridge unit

Details Precast concrete bridge unit Precast concrete bridge unit

2005-11-01

2005-11-01

Clark, Doris (Department: 2914)

Building units and construction elements

Structure

Design Patent

active

D0511215

CLAIM:
The ornamental design of a precast concrete bridge unit, as shown and described.

REFERENCES:
patent: D47171 (1915-03-01), Smith
patent: 2161176 (1939-06-01), Leisner
patent: 4564313 (1986-01-01), Niswander et al.
patent: 4587684 (1986-05-01), Miller
patent: 4993872 (1991-02-01), Lockwood
patent: D356163 (1995-03-01), Ryan
patent: 5590433 (1997-01-01), Fricke
patent: D406902 (1999-03-01), Lockwood

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