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| All Patents in class 409/145 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,388,935 | Feb. 14, 1995 | P.C. Sheldon | Six Axis Machine Tool | milling machines | |
| 5,489,168 | Feb. 06, 1996 | B.P. Konkel, L.D. Ostby, E.E. Kirkham, P.C. Sheldon | Metrology Instrument Arm System | metalworking machine mechanisms | |
| 5,538,373 | Jul. 23, 1996 | E.E. Kirkham | Machine Tool Vibration Isolation System | metalworking machine mechanisms | |