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| All Patents in class 33/1AP | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 192,093 | Jun. 19, 1877 | M.G. Stolp | Circle Dividing Instrument | |
 | 576,626 | Feb. 09, 1897 | L.S. Starrett | Hack Saw | |
 | 1,294,935 | Feb. 18, 1919 | . | Angle and Arc Dividing Ruler | |
 | 1,420,175 | Jun. 20, 1922 | S.P. Alonzo | Angle-Measuring Apparatus | |