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| All Patents in class 144/19 | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,777,286 | Oct. 07, 1930 | G.W. Aldeen | Mortising machine | mortising machines | |
| 1,846,749 | Feb. 23, 1932 | H.T. Parker | Mortising machine | mortising machines | |
| 1,860,809 | May 31, 1932 | W.H. King, A. Huffman | Munting machine | ||
| 3,381,725 | May 07, 1968 | A. Locher | Drilling and inserting machine | dowel insertion machines | |