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| Patents for H. J. Martyn | |||||
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| Number | Date | Patentee | Title | Type | |
| 365,538 | Jun. 28, 1887 | R.L. Rickman | Calf Weaner | animal weaners | |
| 374,005 | Nov. 29, 1887 | R.L. Rickman | Calf Weaner | animal weaners | |