Bridge Builders Keystone Bridge Company | Historic Bridges of the Midwest | Keystone Bridge Co. v Phoenix Iron Co.
Bridge Builders Keystone Bridge Company | Historic Bridges of the Midwest | Keystone Bridge Co. v Phoenix Iron Co.
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Keystone Bridge Company
Descriptive Catalogue of Wrought-Iron Bridges
Facsimile of the company catalogue published around 1874.
Historic Bridges of the Midwest
Photographic records of three bridges constructed by Keystone.
Keystone Bridge Co. v Phoenix Iron Co.
Full ext of case before the U.S. Supreme Court in 1877. Concerns the infringement of two certain patents belonging to the Keystone Bridge Company.
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