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| All Patents in class 198/347.1 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,873,020 | Feb. 10, 1959 | J.G. Kay | Storage and delivery apparatus | workpiece changers and storage mechanisms | |
| 2,987,199 | Jun. 06, 1961 | F.F. Zawaski | Storage Unit | workpiece changers and storage mechanisms | |