US Patent: 946,919
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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: |
Mar. 24, 1909 |
| Granted: |
Jan. 18, 1910 |
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Jeff Joslin
Vintage Machinery entry for Vulcan Iron Works
Vintage Machinery entry for Grinnell Mfg. Co.
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Description: |
| 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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