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| Patents for Charles Christian Wais | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 873,395 | Dec. 10, 1907 | C.C. Wais | Machine for cutting out circular or elliptical forms | |
| 937,491 | Oct. 19, 1909 | C.C. Wais | Water-wheel | ||