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