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| All Patents in class 33/822 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,405,285 | Jan. 31, 1922 | W.H. Church | Micrometer Calipers | calipers | |
| 1,575,246 | Mar. 02, 1926 | D. Anderson | Micrometer Height Adjustment | height gages | |