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| Patents for Dewey Corp. | |||||
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| Number | Date | Patentee | Title | Type | |
| 438,406 | Oct. 14, 1890 | M.W. Dewey | Method of Utilizing Electricity in the Forming of Sheet Metal Articles | sheet metal bending machines | |
| 438,407 | Oct. 14, 1890 | M.W. Dewey | Apparatus for Forming or Shaping Sheet Metal Electrically | sheet metal bending machines | |