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| All Patents in class 42/148 | |||||
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| Number | Date | Patentee | Title | Type | |
| 600,104 | Mar. 01, 1898 | A. Weed | Peep-sight for firearms | firearms | |
| 1,955,182 | Apr. 17, 1934 | E.A. Hall | Suction Device for Cylinder Boring Machines | dust collectors | |
| 1,955,183 | Apr. 17, 1934 | E.A. Hall | Tool Balancing Means | valve grinding tools | |