Francis Hilfreich
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Francis Hilfreich was an aero inventor, with occupation -- and location --.
Patents whose inventor or applicant is Francis Hilfreich
- Patent GB-1884-11994 (English title: Navigable balloon)
- Patent GB-1888-12736 (English title: Navigable balloon)
Possibly same as this person:[1]
- London, England, Electoral Registers, 1832-1965 - Francis Hilfreich had residence(s) noted in 1850, 1851, 1858, 1873, 1875, and 1878 in London.
