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| Patents for Carl Zeiss | |||||
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| Number | Date | Patentee | Title | Type | |
| 632,230 | Sep. 05, 1899 | M. Berger | Revolving Slide Rest | metal lathe accessories and attachments | |
| 664,995 | Jan. 01, 1901 | G. Ernst | Screw Thread Gage | thread gages | |