Google Patents US3759642A - T-slot boltĭownload PDF Info Publication number US3759642A US3759642A US00192167A US3759642DA US3759642A US 3759642 A US3759642 A US 3759642A US 00192167 A US00192167 A US 00192167A US 3759642D A US3759642D A US 3759642DA US 3759642 A US3759642 A US 3759642A Authority US United States Prior art keywords slot shoulder walls bolt die Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.