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| Patents for H. J. Ennis | |||||
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| Number | Date | Patentee | Title | Type | |
| 255,353 | Mar. 21, 1882 | A.W. Swift | Lubricator | steam engine lubricators | |
| CA-53,663 | Oct. 06, 1896 | C.E. Thompson | Combination Tool | combination tools | |
| 577,632 | Feb. 23, 1897 | C.E. Thompson | Monkey Wrench | wrench handle components | |
| CA-56,351 | Jun. 21, 1897 | C.E. Thompson | Carriage Jack | axle nut wrench combination tools | |
| 585,533 | Jun. 29, 1897 | D.J. Quin | Ratchet Wrench | ratchet wrenches | |
| 606,303 | Jun. 28, 1898 | J.S. Scarborough | Oiling Device | wrench combination tools | |