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| Patents for Chamberlain Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 448,588 | Mar. 17, 1891 | F. Simonson | Log lifting and turning machine | sawmill log handling | |
| 448,589 | Mar. 17, 1891 | F. Simonson | Stopping apparatus | sawmill accessories | |
| 448,590 | Mar. 17, 1891 | F. Simonson | Log loader and turner | sawmill log handling | |
| 448,591 | Mar. 17, 1891 | F. Simonson | Log lifter and turner | sawmill log handling | |
| 448,592 | Mar. 17, 1891 | F. Simonson | Log lifter and turner | sawmill log handling | |
| 448,593 | Mar. 17, 1891 | F. Simonson | Log lifter and turner | sawmill log handling | |