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| All Patents in class 407/86 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,295,187 | Jan. 03, 1967 | H.R. Plummer | Adjustable Block Type Cutting Tool With Clamped on Insert Blades | insert tool holders | |
| 3,316,615 | May 02, 1967 | T.V. Williams | Machine Tool | boring bars | |
| 3,501,822 | Mar. 24, 1970 | T.V. Williams | Tool with Bit Holder | milling machine tools | |
| 3,572,197 | Mar. 23, 1971 | R.M. Ortlieb | Adjustable Toolholder | drilling and boring tool holders | |