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| Patents for E. A. Duggan | |||||
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| Number | Date | Patentee | Title | Type | |
| 514,080 | Feb. 06, 1894 | J.O. Johnson | Combination Handsaw | bevels | |
| 552,659 | Jan. 07, 1896 | A.B. Brown | Micrometer Calipers | micrometers | |
| 586,164 | Jul. 13, 1897 | P. Denere | Floor Plane | floor planes | |
| 598,729 | Feb. 08, 1898 | A. Jones | Jones Cable Saw | coping saws | |
| 617,440 | Jan. 10, 1899 | A. Jones | Scroll-Saw | coping saws | |
| 624,149 | May 02, 1899 | A.H. Anderson | Wrench | quick adjust wrenches | |