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| All Patents in class 250/224 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,441,403 | May 11, 1948 | B.N. Engle, J.B. Engle | Teeth setter for saws | |
 | 2,670,650 | Mar. 02, 1954 | R.W. Willmotte | Electronic Limit Micrometer | |
 | 2,886,717 | May 12, 1959 | A.T. Sheperd, D.T. Williamson, G.S. Walker | Measuring Apparatus | |
| 3,588,480 | Jun. 28, 1971 | E. Bright, P.I. Unger | Processing Control System | ||