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| All Patents in class 33/DIG.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,392,313 | Oct. 04, 1921 | G.S. Fallow | Screw Thread Gage | special purpose gauges | |
| 1,462,101 | Jul. 17, 1923 | E.G. Colson | Tool | clamps | |
| 1,888,454 | Nov. 22, 1932 | W.R. Edson | Loose play indicator | ||
| 4,070,760 | Jan. 31, 1978 | U. Roth, L. Roth | Micrometer | micrometers | |
| 5,131,161 | Jul. 21, 1992 | G. Drag | Guide Post and Master Cylinder Squareness Gage | measurement gauges | |