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| All Patents in class 271/119 | |||||
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| Number | Date | Patentee | Title | Type | |
| 245,608 | Aug. 16, 1881 | J.J. Burk | Feeding-attachment for planing-machines | wood planers | |
| 3,451,142 | Jun. 24, 1969 | R.H. Hartjen | Teaching Machine | audio-visual apparatus | |