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US Patent: 187,513
Improvement in bridges
Patentee:
Ellery E. Colby (exact or similar names) - Groton, NY

USPTO Classifications:
14/13, 14/14, 14/15, 236/68A, 52/639

Tool Categories:
manufacturing : manufacturing processes : bridges
structures : bridges

Assignees:
Charles Perrigo - Groton, NY
Caleb Bartholomew - Groton, NY
Oliver Avery, Jr. - Groton, NY
Ellery E. Colby - Groton, NY

Manufacturer:
Groton Iron Works - Groton, NY

Witnesses:
Frank Galt
Frank H. Duffy

Patent Dates:
Applied: Jan. 29, 1877
Granted: Feb. 20, 1877

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Groton Iron Works

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