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| All Patents in class 338/2 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,547,647 | Apr. 03, 1951 | G.N. Levesque | Straightedge | ||
| 4,549,439 | Oct. 29, 1985 | L.P. Barrett, H.J. Keen | Moistureproof Load Cell for Food Processing Applications and Method for Making the Same | electrical measuring apparatus | |