Category:United States patent 1682572

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<nowiki>United States patent 1682572; direct reading spectrophotometer</nowiki>
United States patent 1682572 
direct reading spectrophotometer
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Location
  • United States of America
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Full work available at URL
Inception
  • 15 October 1925
Publication date
  • 28 August 1928
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Media in category "United States patent 1682572"

The following 6 files are in this category, out of 6 total.