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Patents for J. Craig Shields | |||||
Number | Date | Patentee | Title | Type | |
716,279 | Dec. 16, 1902 | A. Rieffel | Micrometer Gage | micrometer depth gauges | |
747,224 | Dec. 15, 1903 | A. Rieffel | Micrometer Gage | micrometers |