Catalogue description patent specifications, letters, certificates, papers

This record is held by Institution of Engineering and Technology (IET) Archives

Details of NAEST 25
Reference: NAEST 25
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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