Concrete tunnel for a rapid transit train

Details Concrete tunnel for a rapid transit train Concrete tunnel for a rapid transit train

2003-01-24

2004-05-25

Clark, Doris (Department: 2914)

Building units and construction elements

Structure

CD25S122000

Design Patent

active

D0490533

CLAIM:
The ornamental design of a concrete tunnel for a rapid transit train, as shown and described.

REFERENCES:
patent: 4993872 (1991-02-01), Lockwood
patent: 5252002 (1993-10-01), Day
patent: D454203 (2002-03-01), Bellavance
BEBO Arch System, Zurn Industries, Inc., 1982.

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