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Snow plow compatible speed bumps
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Patent number 5,415,493
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Issue date May 16, 1995
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The United States of America as represented by the Secretary of the Army
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Robert A. Eaton
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Snow plow compatible speed bumps
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Patent number 5,295,759
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Issue date Mar 22, 1994
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The United States of America as represented by the Secretary of the Army
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Stephen N. Flanders
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES