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