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| All Patents in class 409/98 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,588,856 | Jun. 15, 1926 | J.C. Shaw | Contouring tracer | flexible shafts | |
| 2,254,229 | Sep. 02, 1941 | E. Lochman | Electric tracer-control machine for diesinking and the like | ||
| 2,335,304 | Nov. 30, 1943 | F.A. Parsons | Pattern Controlled Copy Machine | milling machines | |