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CA Patent: CA-133,141
Corrugated culvert and process of producing same
Patentee:
Arthur A. Koch - Albert Lea, MN

USPTO Classifications:

Tool Categories:

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 18, 1911
Granted: May 16, 1911

Patent Pictures:
CIPO Data
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"Vintage Machinery" entry for Grinnell Manufacturing Co.
"Vintage Machinery" entry for Vulcan Iron Works
Description:
This is the Canadian equivalent of US patent 946,919.

The inventor owned Grinnell Manufacturing Co. and Vulcan Iron Works (both of them in Iowa) at the time this patent was issued; we do not know if either of those businesses manufactured this culvert.

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