Catalogue description patent specifications, letters, certificates, papers
This record is held by Institution of Engineering and Technology (IET) Archives
Reference: | NAEST 25 |
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Description: | patent specifications, letters, certificates, papers |
Date: | 1882-87 |
Held by: | Institution of Engineering and Technology (IET) Archives, not available at The National Archives |
NRA catalogue reference: | NRA 20552 Insulite |
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