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Patents for James H. McCaffrey | |||||
Number | Date | Patentee | Title | Type | |
1,069,186 | Aug. 05, 1913 | F.X. Rudler | Rustless Rule | folding rule joints | |
1,501,713 | Jul. 15, 1924 | J.H. McCaffrey | Rustless Rule | folding rule joints |