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| All Patents in class 144/70 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,633,370 | Jun. 21, 1927 | S. Hunter | Door-lock-mortising machine | mortising machines | |
| 1,642,723 | Sep. 20, 1927 | H. de Wallace | Mortising machine | mortising machines | |
| 1,698,827 | Jan. 15, 1929 | M. Skolnik | Mortising machine | mortising machines | |
| 1,718,324 | Jun. 25, 1929 | F.W. Wappat | Mortising machine | mortising machines | |
| 1,738,227 | Dec. 03, 1929 | R.L. Carter | Mortising machine | mortising machines | |