CA Patent: CA-30,994
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| Pipe Wrench
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Patentee:
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| Daniel R. Porter (exact or similar names) - Chelsea, MA |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Jan. 12, 1889 |
| Granted: |
Mar. 22, 1889 |
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Patent Pictures:
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Daniel R. Porter patent March 22, 1889 - edited from Canadian Patent Office Record |
CIPO Data
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Stan Schulz
30,994 in Canadian Patents Database
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Description: |
| The patent's claims are the relative layout of the parts. It differs from prior Canadian patent CA-27,657 and U.S. patent 389,899 by inserting a pivot point in the adjustable jaw.
British patent GB-188901609 registered Jan. 29, 1889 corresponds to this version of Porter's patent. |
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