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| Patents for Park Metalware | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,386,217 | Aug. 02, 1921 | J. Zilliox | Wrench | bicycle or pocket wrenches | |
| 1,535,281 | Apr. 28, 1925 | J. Zilliox | Wrench | wrench jaw components | |
| 1,626,906 | May 03, 1927 | J. Zilliox | Wrench | wrench handle components | |
| 1,639,831 | Aug. 23, 1927 | J. Zilliox | Wrench | wrench adjustment locks | |