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| All Patents in class 33/712 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,044,983 | Jun. 23, 1936 | T.L. Hedgpeth | Belt and pulley measuring apparatus | ||
| 4,993,167 | Feb. 19, 1991 | D.L. Durfee, Jr. | Dressing Tool Gauge for Positioning Cutting Tools in Removable Head Type Dressers | measurement gauges | |