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| All Patents in class 29/33K | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,990,138 | Feb. 05, 1935 | H. Schüster | Measuring Device for Tube Walls | measurement gauges | |
| 2,222,605 | Nov. 26, 1940 | G.H. Carlson | Apparatus for assembling anti-friction bearings | ||
| 4,100,661 | Jul. 18, 1978 | E.G. Cheak | Door hinge applying apparatus | specialty woodworking machines | |