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| All Patents in class 428/600 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,791,248 | May 07, 1957 | D.D. Beale | Plated saw blade | sawblades | |
| 3,058,205 | Oct. 16, 1962 | B. Sassen, C.L. Sporck | Lightweight Plurality of Generally Conical, Hollow, Metallic Objects | metal spinning machines | |