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| All Patents in class 428/15 | |||||
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| Number | Title | Classification(s) | |||
| 126,042 | Improvement in composition-stone frames for hot-air registers | 428/15 | |||
| 1,949,517 | Antislipping tread and method of making the same | 264/256, 264/77, 404/19, 428/149, 428/15, 428/207, 428/325, 52/DIG.007 | |||