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| All Patents in class 188/380 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,998,867 | Sep. 05, 1961 | A.H. Dall | Vibration Damper | metalworking machine mechanisms | |
| 3,522,864 | Aug. 04, 1970 | R.C. Richter | Tuned Vibration Damper Assembly for Machine Tools | metalworking machine mechanisms | |