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Patents for Dahl Mfg. Co.
Patents 1 - 3 of 3
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
  1,068,887Jul. 29, 1913H. GasstromRule
  1,159,012Nov. 02, 1915H. GasstromStructure Made of Relatively Movable Interlocking Sections
1,288,556Dec. 24, 1918H. GasstromInterlox Rule
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