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US Patent: 434,060
Machine for Corrugating Tubes
Patentees:
John S. Hansen (exact or similar names) - Medford, Middlesex County, MA
Charles D. Wainwright (exact or similar names) - Medford, Middlesex County, MA

USPTO Classifications:
72/103, 72/95

Tool Categories:
specialty machines : tube corrugating machines

Assignees:
Wainwright Mfg. Co. - Boston, Suffolk County, MA

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Mar. 30, 1889
Granted: Aug. 12, 1890

Patent Pictures:
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