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| All Patents in class 74/591 | |||||
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| Number | Date | Patentee | Title | Type | |
| 447,607 | Mar. 03, 1891 | W. Gleason | Safety Attachment for Lathes | metal lathe accessories and attachments | |
| 4,625,609 | Dec. 02, 1986 | S.W. Ashworth | Counterbalancing mechanism for scroll saw | ||