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| All Patents in class 42/67 | |||||
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| Number | Date | Patentee | Title | Type | |
| 7,629 | Sep. 10, 1850 | S. Colt | Improvement in revolving chambered fire-arms | revolvers | |
| 10,821 | Apr. 25, 1854 | C. Buss | Improvement in fire-arms | revolvers | |
| 15,144 | Jun. 17, 1856 | H.S. North | Fire-arms | revolvers | |
| AI265 | Feb. 21, 1860 | J. Ells | Revolver firearm | ||