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| Patents Granted on 1972-11-21 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-915,294 | Nov. 21, 1972 | J.C. Jones | Grinding Machines | roll grinding machines | |
| 3,703,196 | Nov. 21, 1972 | C. Hedrei | System for controlling the setting of a quadruple band saw | band sawmills | |