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| All Patents in class 279/20 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,938,410 | May 31, 1960 | C.R. Leonard | Seal arrangement | |
 | 3,024,030 | Mar. 06, 1962 | R.G. Koch | Coolant transfer and seal assembly having relatively rotating parts | |
| 3,893,355 | Jul. 08, 1975 | C.R. Maastricht | Coolant Supply System for Cutting Tools in a Machine Tool | ||
| 3,978,765 | Sep. 07, 1976 | J.R. Scaduto | Internal and External Cutting Tool | ||
| 4,640,652 | Feb. 03, 1987 | J.C. Rivera, Jr. | Coolant Delivery System | ||