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Patents for Franklin Alfred Errington | |||||
Number | Date | Patentee | Title | Type | |
558,053 | Apr. 14, 1896 | F.A. Errington | Automatic Tapping Attachment | tapping heads and chucks | |
558,055 | Apr. 14, 1896 | F.A. Errington | Tapping Attachment | tapping heads and chucks |