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| All Patents in class 361/268 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 287,170 | Oct. 23, 1883 | A.W. Roovers, A.H. Roovers | Electric cane | |
| 2,162,329 | Jun. 13, 1939 | E.J. Dillman | Transformer Relay Unit | ||