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| All Patents in class 227/121 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,271,548 | Jul. 09, 1918 | J. Doig | Staple-driving machine | nailing machines | |
| 2,127,357 | Aug. 16, 1938 | J. Gualtiere | Riveting machine | riveting machines | |