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| All Patents in class 33/645 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,782,284 | Nov. 18, 1930 | M. Betancourt | Bit Gauge with Level | drill depth stops | |
| 2,167,189 | Jul. 25, 1939 | J. Verderber | Machine Tool | metalworking machines | |
| 2,761,217 | Sep. 04, 1956 | H. King | Machine Alignment Detector | measuring tools | |
| 2,807,091 | Sep. 24, 1957 | F.E. Michelson | Keyway Checkers | measurement gauges | |
| 4,890,421 | Jan. 02, 1990 | K.S. Barney, W.R. Moore, Jr. | Automatic Measurement System | measuring tools | |