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| All Patents in class 33/501.08 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 1,308,179 | Jul. 01, 1919 | H. Kläger | Measuring Apparatus | ||
| 1,636,543 | Jul. 19, 1927 | E.H. Aldeborgh | Adjustable Limit-Pin Gauge | ||
 | 1,656,180 | Jan. 17, 1928 | G.A. Eisele | Micrometer Expansion Gauge | |
| 1,755,152 | Apr. 15, 1930 | J.W. Parker | Radius Tool | ||
| 1,859,063 | May 17, 1932 | E.H. Aldeborgh | Adjustable Plug Gauge | ||