Catalogue description Claimant(s): Hughes, H. and Son; Hyde-Thomson, R.D. Nature of Invention: Aeroplane...

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Details of T 173/666
Reference: T 173/666
Description:

Claimant(s): Hughes, H. and Son; Hyde-Thomson, R.D. Nature of Invention: Aeroplane compasses

Date: 1921-1923
Held by: The National Archives, Kew
Legal status: Public Record(s)
Closure status: Open Document, Open Description

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