File:US patent 766474-006-F17.png

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Charles R. Underhill: Receiving telegraph instrument  wikidata:Q126917670 reasonator:Q126917670 https://en.wikisource.org/wiki/Index:United_States_patent_766474.pdf
Author
Charles R. Underhill  (1877–1947)  wikidata:Q73423551 s:en:Author:Charles Reginald Underhill
 
Charles R. Underhill
Alternative names
Charles Reginald Underhill
Description American inventor and writer
Date of birth/death 1877 Edit this at Wikidata 1947 Edit this at Wikidata
Authority file
creator QS:P170,Q73423551
 Edit this at Wikidata
image of artwork listed in title parameter on this page
Title
Receiving telegraph instrument Edit this at Wikidata
title QS:P1476,en:"Receiving telegraph instrument Edit this at Wikidata"
label QS:Len,"Receiving telegraph instrument Edit this at Wikidata"
Object type version, edition or translation / digital representation / digital media Edit this at Wikidata
Description
Figure 17
Language English Edit this at Wikidata
Publication date 2 August 1904 Edit this at Wikidata
Source File:United States patent 766474.pdf
This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
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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current09:47, 19 July 2024Thumbnail for version as of 09:47, 19 July 2024738 × 353 (88 KB)RaboKarbakian (talk | contribs){{Book |Description=Figure 17 |Source=File:United States patent 766474.pdf |Image page = 5 |other_versions= |wikidata = Q126917670 }} {{PD-scan|PD-US-expired}} Category:United States patent 766474

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