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| Patents for Blanche Dewar | |||||
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| Number | Date | Patentee | Title | Type | |
| 403,509 | May 21, 1889 | F. Higgins | Lathe-chuck | metal lathe chucks | |
| D19,168 | Jun. 18, 1889 | J.H. Vinton | Design for Jaws of a Pipe Wrench | pipe wrenches | |
| 414,663 | Nov. 05, 1889 | J.H. Vinton | TRIMO pipe wrench | pipe wrenches | |