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| Patents for Rolland B. Aiman | |||||
| Picture | Number | Date | Patentee | Title | |
| 2,349,240 | May 23, 1944 | R.B. Aiman | Adjustable Multiple Spindle Drill Head | ||
| 2,452,709 | Nov. 02, 1948 | R.B. Aiman | Lubricating System for Adjustable Multiple Spindle Drill Head | ||