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| Patents for G. G. Haddow | |||||
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| Number | Date | Patentee | Title | Type | |
| 382,348 | May 08, 1888 | C.E. Billings | Beam-Calipers | calipers | |
| 389,599 | Sep. 18, 1888 | F.C. Rockwell | Die for forming barrel-stave | barrel making machines | |