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| Patents for Charles A. Usiskin | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,367,612 | Feb. 06, 1968 | C.A. Usiskin | Adjustable Indicator Holder | test indicator holders | |
| 3,581,354 | Jun. 01, 1971 | C.A. Usiskin | Instrument Clamp | dial indicator attachments | |