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| Patents for Green Instrument Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,627,658 | Feb. 10, 1953 | E.T. Green | Engraving Machine | metal engraving machines | |
| 2,703,455 | Mar. 08, 1955 | E.T. Green | Autoradial Engraving Device | metal engraving machines | |