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| Patents for John W. Parker | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,124,006 | Jul. 19, 1938 | J.W. Parker | Dial Test Indicator | test indicators | |
| 2,555,243 | May 29, 1951 | J.W. Parker | Thread Construction | ||
| 2,563,061 | Aug. 07, 1951 | J.W. Parker | Micrometer Thimble | ||