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| Patents for David G. Williams | |||||
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| Number | Date | Patentee | Title | Type | |
| 493,191 | Mar. 07, 1893 | M.F. Smith | Machine for Finishing Bores of Large Gun Tubes or Cannon | cannons | |
| 506,342 | Oct. 10, 1893 | M.F. Smith | Metal Cutting and Working Machine | ||