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All Patents in class 33/823 | |||||
Number | Date | Patentee | Title | Type | |
2,029,940 | Feb. 04, 1936 | W. Pincin | Micrometer | micrometers | |
2,322,167 | Jun. 15, 1943 | E.C. Shoemaker | Micrometer | micrometers |