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| Patents for Nielsen-Barton Chuck & Tool Co. | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 1,542,826 | Jun. 23, 1925 | H. Nielsen | Chuck | |
![]() | 1,542,827 | Jun. 23, 1925 | H. Nielsen | Lathe center | |
![]() | 1,606,972 | Nov. 16, 1926 | H. Nielsen | Chuck | |