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| Patents Granted on 1980-11-25 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-1,090,108 | Nov. 25, 1980 | R. Johnstone | Unmanned machining center with tool checking | tool changers and storage mechanisms | |
| CA-1,090,109 | Nov. 25, 1980 | R. Johnstone | Method of cleaning chips from a work-piece in an unmanned machining center | metalworking machine mechanisms | |