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| All Patents in class 73/45.1 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 779,719 | Jan. 10, 1905 | P. Krruse | Can-testing machine | ||
 | 938,165 | Oct. 26, 1909 | C.B. McDonald | Can-testing machine | |
 | 945,573 | Jan. 04, 1910 | C.B. McDonald, C.D. McDonald | Can-testing machine | |
| 1,013,796 | Jan. 02, 1912 | C.B. McDonald, J.E. McCullough | Can-testing machine | ||
| 1,694,132 | Dec. 04, 1928 | C.D. McDonald | Can-testing machine | ||