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| Patents for Robert H. Brockman | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,839,139 | Dec. 29, 1931 | R.H. Brockman | Lathe Tool Holder | ||
| 1,913,261 | Jun. 06, 1933 | R.H. Brockman | Lathe Tool Holder | ||