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| All Patents in class 219/216 | |||||
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| Number | Title | Classification(s) | |||
| 2,297,691 | Electrophotography | 101/467, 101/DIG.37, 219/216, 347/131, 347/137, 347/140, 358/300, 361/225, 399/314, 430/120.1, 430/124.1, 430/125.32, 430/55 | |||