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| All Patents in class 177/225 | |||||
| Picture | Number | Date | Patentee | Title | |
| 2,054,184 | Sep. 15, 1936 | E.J. Von Pein | Scale | ||
| 2,873,416 | Feb. 10, 1959 | K.C. Allen | Weighing scale adapted servomotor system | ||