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| All Patents in class 210/400 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,346,500 | Apr. 11, 1944 | R.C. Moore | Drying method and apparatus | ||
| 2,642,994 | Jun. 23, 1953 | K.H. Casson | Apparatus for handling magnetic material | ||
| 4,685,361 | Aug. 11, 1987 | C.J. Myers | Machine Tool | metalworking machine mechanisms | |
| 5,177,335 | Jan. 05, 1993 | R.W. Ritchey, Jr., J.D. Hartwig | Prefilter for EDM machine | electrical discharge machining | |