CA Patent: CA-12,020
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| Improvements on Threshing Machines
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Patentees:
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| Leonidas Gray (exact or similar names) - Middletown Springs, VT |
| Albert Y. Gray (exact or similar names) - Middletown Springs, VT |
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Patent Dates:
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| Applied: |
Oct. 23, 1880 |
| Granted: |
Nov. 24, 1880 |
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Patent Pictures:
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Leonidas and Albert Y. Gray patent Nov. 24, 1880 (wrench) - edited from Canadian Patents Database |
CIPO Data
Espacenet patent
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Stan Schulz
12,020 in Canadian Patents Database
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Description: |
| The patent discusses the construction of the cylinder and concaves, and the components of a ratchet wrench designed to work with that construction.
The wrench design also received a separate U.S. patent (no. 227,765 granted May 18,1880). An example is pictured in the DATAMP entry for that patent. |
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