CA Patent: CA-133,141
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| Corrugated culvert and process of producing same
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Patentee:
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| Arthur A. Koch (exact or similar names) - Albert Lea, MN |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 18, 1911 |
| Granted: |
May 16, 1911 |
CIPO Data
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Jeff Joslin
Vintage Machinery entry for Grinnell Mfg. Co.
Vintage Machinery entry for Vulcan Iron Works (Mason City, IA)
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Description: |
| This is the Canadian equivalent of US patent 946,919.The inventor owned Grinnell Mfg. 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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