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| All Patents in class 313/271 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,338,621 | Jan. 04, 1944 | A.G. Carter | Electric lamp | sawmill accessories | |
| 3,548,255 | Dec. 15, 1970 | R.J. Kyp | Incandescent lamp with oscillating filament | incandescent light bulbs | |