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| Patents Granted on 1987-04-07 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-1,220,018 | Apr. 07, 1987 | R. Johnstone | Motorized ball nut | metalworking machine mechanisms | |
| CA-1,220,186 | Apr. 07, 1987 | F.V. Marchal | Robinet A Boisseau Spherique Pour Hautes Pressions | industrial valves | |
| 4,655,655 | Apr. 07, 1987 | H. Schürfeld | Tool and Workpiece Holding Arrangement for Material Removing Machining | insert tool holders | |
| 4,656,418 | Apr. 07, 1987 | L.D. Pacetti, J.T. Boston | Molded Clamp-Type Ammeter Probe | ||