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| All Patents in class 227/152 | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,254,895 | Mar. 10, 1981 | E.G. Cheak | Apparatus for automatic alignment and attachment of a doorjamb and stop | specialty woodworking machines | |
| 4,572,420 | Feb. 25, 1986 | A. Pistorius | Hand lever operated vee nail frame assembly machine | nailing machines | |