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| All Patents in class 315/121 | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 372,942 | Nov. 08, 1887 | W. Stanley, Jr. | System of electrical regulation | |
![]() | 2,076,275 | Apr. 06, 1937 | A.P. Jorgenson | Electric flasher | |