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| All Patents in class 33/534 | |||||
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| Number | Date | Patentee | Title | Type | |
| 3,788,633 | Jan. 29, 1974 | A. Cho | Adjustable Angle Plate Arrangement | angle bars and angle plates | |
| 4,315,373 | Feb. 16, 1982 | J.O. Lenz | Machine vise protractor | vise accessories | |