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| All Patents in class 33/543.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,403,546 | Jul. 09, 1946 | J.O. Olsen | Method and apparatus for honing | honing machines | |
| 2,590,151 | Mar. 25, 1952 | W.J. Bryant, H.H. Gates, T.H. Ljunggren | Bore gauge head | grinding attachments | |
| 2,801,475 | Aug. 06, 1957 | F. Meyer, Jr. | Gage for Measuring Circumambient Surfaces | special measuring tools | |
| 3,201,974 | Aug. 24, 1965 | W.J. Croshier | Air Plug Gage Construction | plug gauges | |