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| Patent CA909 | |||||
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| Number | Date | Patentee | Title | Type | |
| 909 | Sep. 08, 1838 | J.M. Jorden | Improvement in Fire-Plugs and Hydrants to Prevent the Water From Freezing in Them | auxiliary wrenches | |
| CA-909 | Apr. 04, 1871 | W.H. Barwick | Barwick Improved Wrench | pliers type wrenches | |