US Patent: 67,181
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| Improvement in moulds for casting metal
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Patentees:
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| John Farrar (exact or similar names) - Providence, RI |
| William Groves (exact or similar names) - Providence, RI |
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Patent Dates:
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| Granted: |
Jul. 30, 1867 |
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Jeff Joslin
Vintage Machinery entry for Pacific Iron Works
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Description: |
| An 1872 ad from the Pacific Iron Works in San Francisco says, "We have fitted up a Foundry for the exclusive manufacture of Cast Iron GAS AND WATER PIPE by Farrar's patent process. This pipe is superior to any of Eastern or European manufacture." |
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