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