Jean-Marie-Stephen Graf
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Jean-Marie-Stephen Graf was an aero inventor who worked on hydroplanes. Graf's name was sometimes written with an accent, thus: Jean-Marie-Stéphen Graf Occupation? Location?
Patents whose inventor or applicant is Jean-Marie-Stephen Graf
- Patent FR-1919-491223 (English title: Incapacitated hydroaeranium, Filing date: 1915-07-30)
- Patent FR-1919-491223.20842 (English title: hydroplane, Supplementary to patent: Patent FR-1919-491223, Filing date: 1916-12-13)
Patents whose inventor or applicant is Jean-Marie-Stéphen Graf
- Patent FR-1919-491223 (English title: Incapacitated hydroaeranium, Filing date: 1915-07-30)
- Patent FR-1919-491223.20842 (English title: hydroplane, Supplementary to patent: Patent FR-1919-491223, Filing date: 1916-12-13)
