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| All Patents in class 409/133 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,042,257 | May 26, 1936 | C.W. Hopkins, R.E. Harrison | Machine Tool | grinding machines | |
| 4,576,069 | Mar. 18, 1986 | J. Bazuin | Turret Lathe Having Probe and Protective Cover | metalworking machine mechanisms | |
| 4,628,441 | Dec. 09, 1986 | L.D. Ostby, H. Chung, E.E. Kirkham, R. Johnstone | Automatic Dynamic Error Compensator | metalworking machine mechanisms | |
| 5,066,176 | Nov. 19, 1991 | R. Johnstone | Probe for Machine Tool | metalworking machine mechanisms | |