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| Patents for Donald H. Montgomery | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,174,860 | Oct. 03, 1939 | G.A. Cardell, D.H. Montgomery | Tool Holding Device | ||
| 2,281,706 | May 05, 1942 | G.A. Cardell, D.H. Montgomery | Tool Holder | ||
| 2,557,454 | Jun. 19, 1951 | D.H. Montgomery | Turning Tool | ||