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| Patents Granted on 1967-03-28 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,311,003 | Mar. 28, 1967 | J. Daugherty | Facing Head Attachment and Drive Mechanism Therefor | metalworking machine mechanisms | |
| 3,311,024 | Mar. 28, 1967 | J. Daugherty | Rotary Actuator Power Drawbolt for Machine Tool Spindles | metalworking machine mechanisms | |
| 3,311,025 | Mar. 28, 1967 | R.E. Stobbe, F. Zankl | Feed Rate Modifier | milling machines | |