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| All Patents in class 177/DIG.003 | |||||
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| Picture | Number | Date | Patentee | Title | |
| 2,803,448 | Aug. 20, 1957 | L.B. Biebel | Computing scale | ||
| 2,860,867 | Nov. 18, 1958 | L.B. Biebel, K.C. Allen | Computing scale | ||
| 3,044,691 | Jul. 17, 1962 | K.C. Allen | Computing scale | ||
| 3,139,612 | Jun. 30, 1964 | K.C. Allen | Scale | ||