File:US patent 1682572.pdf

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Original file(1,158 × 1,702 pixels, file size: 953 KB, MIME type: application/pdf, 10 pages)


Carl W. Keuffel: United States patent 1682572  wikidata:Q124487477 reasonator:Q124487477 s:en:United States patent 1682572  Add properties to Wikidata item based on this file
Carl W. Keuffel    wikidata:Q124488092 s:en:Author:Carl W. Keuffel
Carl W. Keuffel
Alternative names
C. W. Keuffel
Description American inventor
Authority file
creator QS:P170,Q124488092
 Edit this at Wikidata
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United States patent 1682572 Edit this at Wikidata
title QS:P1476,en:"United States patent 1682572 Edit this at Wikidata"
label QS:Len,"United States patent 1682572 Edit this at Wikidata"
Object type United States patent / document Edit this at Wikidata
Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer).
Language English Edit this at Wikidata
Date 15 October 1925 Edit this at Wikidata
Publication date 28 August 1928 Edit this at Wikidata
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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//


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current11:39, 11 February 2024Thumbnail for version as of 11:39, 11 February 20241,158 × 1,702, 10 pages (953 KB)RaboKarbakian{{Information |Description=Patent for C. W. KEUFFEL OPTICAL INSTRUMENT (a direct reading spectrophotometer). |Source= |Date=1925-10-15 |Author=C. W. Keuffel |Permission= |other_versions= }} {{PDF}} Category:United States patent 1682572 Category:Carl W. Keuffel Category:Spectrophotometers

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