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| All Patents in class 327/514 | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 2,670,650 | Mar. 02, 1954 | R.W. Willmotte | Electronic Limit Micrometer | |
| 3,032,662 | May 01, 1962 | G.T. Moore | Compensation for Activity Changes in Semiconductor Devices | ||