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File:Grubb Niedrach photo.jpg

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Leonard Niedrach (left) and Thomas Grubb (right), inventors of proton-exchange membrane technology.
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Leonard Niedrach (left) and Thomas Grubb (right), inventors of proton-exchange membrane technology.
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Kullanıcı:Kaf Dağının Sırrı/Proton Değişim Membranı
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work of the federal government of the United States
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File
File history
File usage
Global file usage
Metadata
File:Grubb Niedrach photo.jpg
489 × 599 pixels
196 × 240 pixels
616 × 755 pixels
Original file
Wikimedia Commons
description page there
You can help
https://siarchives.si.edu/collections/siris_arc_384525
public domain
work prepared by an officer or employee of the United States Government as part of that person’s official duties
Title 17, Chapter 1, Section 105
US Code
U.S. state
territory
United States Postal Service
since 1978
313.6(C)(1)
The US Mint Terms of Use
This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
depicts
copyright status
public domain
applies to jurisdiction
United States of America

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