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| Patents for Transmitting Dynamometer Co. | |||||
| Picture | Number | Date | Patentee | Title | |
![]() | 248,612 | Oct. 25, 1881 | H. Ruddick | Recording Dynamometer | |
![]() | CA-14,092 | Jan. 30, 1882 | H. Ruddick | Perfectionnement des Dynamometres-Compteurs | |