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| All Patents in class 403/367 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 64,292 | Apr. 30, 1867 | J.W. Douglas | Improvement in hose-couplings | |
| 390,583 | Oct. 02, 1888 | F.E. Frey | Shaft and Pulley Coupling | ||