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Patents for Robert P. Callaghan Jr. | |||||
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Number | Date | Patentee | Title | Type | |
4,129,949 | Dec. 19, 1978 | R.P. Callaghan, Jr. | Height Gage | ||
CA-1,091,004 | Dec. 09, 1980 | R.P. Callaghan, Jr. | Height Gage with Frictionless Slider |