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| All Patents in class 356/242.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 901,879 | Oct. 20, 1908 | L. Chronik, A. Chronik | Thread Counting Apparatus | thread counting apparatus | |
| 970,795 | Sep. 20, 1910 | L. Chronik, A. Chronik | Thread Counting Apparatus | thread counting apparatus | |
| 1,740,970 | Dec. 24, 1929 | L. Chronik, A. Chronik | Thread Counting Apparatus | thread counting apparatus | |