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| Patents for E. M. Watson | |||||
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| Picture | Number | Date | Patentee | Title | |
| 383,031 | May 15, 1888 | A. Allgoever | Drill-stock | ||
 | 393,080 | Nov. 20, 1888 | C.L. Seabury | Naphtha Engine | |
 | 395,592 | Jan. 01, 1889 | M. Schwarzler | Feed attachment for drilling-machines | |
 | 410,299 | Sep. 03, 1889 | C. Spofford | Machine for cutting out concavo-convex shells or dishes | |
 | 419,805 | Jan. 21, 1890 | C.W. Weiss | Thermo Dynamic Motor | |
 | 419,806 | Jan. 21, 1890 | C.W. Weiss | Gas Engine | |
 | 422,067 | Feb. 25, 1890 | M. Berheim | Tailor's Conformating Measure | |