British and French patents, 1861-1862, for John Marshall's invention for 'the collection, concentration and transmission of sound, so as to facilitate the hearing.' Also includes a Belgian 'brevet d'importation.'
Marshall, John
This material is held atSenate House Library Archives, University of London
- Reference
- GB 96 MS 756
- Dates of Creation
- 1861-1862
- Name of Creator
- Language of Material
- English French
- Physical Description
- 2 volumes, 2 single sheets
Scope and Content
Administrative / Biographical History
No information was available at the time of compilation.
Access Information
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Other Finding Aids
Collection-level description.
Archivist's Note
Conditions Governing Use
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