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| Patents for Bertram B. Quillen | |||||
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| Number | Date | Patentee | Title | Type | |
| 775,372 | Nov. 22, 1904 | G. Langen | Counter-shaft with changeable speed | metalworking variable speed mechanisms | |
| 1,986,006 | Jan. 01, 1935 | B.B. Quillen, G. Langen, R.H. McClellan | Machine Tool Construction | metal planers | |