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| Patents for H. R. Eggers | |||||
| Number | Date | Patentee | Title | Type | |
| 1,351,230 | Aug. 31, 1920 | P.E. Chapman | Armature and coil winding machine | electric motor making | |
| 1,523,630 | Jan. 20, 1925 | P.E. Chapman | Armature-winding machine | electric motor making | |