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Patents > Year granted: 1919 & National tech categories : FR 6.4 or USPC 244/30 & Number of text pages: 2-3

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Inventors:
None (11) · Émile Letord (4) · Jules Védrines (3) · Louis-Léon Astoux (3) · Gianni Caproni (3) · Jane-Françoise-Mathilde Giraud (2) · Alfred Merlue (2) · Thomas Sopwith (2) · Thomas Sloper (2) · Jean-Marie-Stephén Graf (2) · Marcel Besson (2) · Henri-Joseph-Léon-Marie de la Chevardière de la Grandville (2) · Georges-Henri-Marius Canton (2)
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None (11) · Émile Letord (4) · Louis-Léon Astoux (3) · Jules Védrines (3) · Gianni Caproni (3) · Thomas Sopwith (2) · Thomas Sloper (2) · Marcel Besson (2) · Jean-Marie-Stephen Graf (2) · Henri-Joseph-Léon-Marie de la Chevardière de la Grandville (2) · Georges-Henri-Marius Canton (2) · Jane-Françoise-Mathilde Giraud (2) · Alfred Merlue (2)
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Tech fields:
airplane (25) · design (15) · None (12) · construction (10) · control (9) · propellers (9) · aerodynamics (7) · fuselage (6) · frame (6) · propulsion (5) · subsystem (5) · stability (5) · wings (4) · lift (4)
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None (7)
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IPCs:
IPC B64C3/00 (11) · IPC B64C3/18 (6) · IPC B64C17/00 (6) · IPC B64C1/00 (5) · IPC B64C35/00 (5) · IPC B64C11/00 (3) · IPC B64C13/00 (3) · IPC B64C27/04 (3) · IPC B64B1/62 (2) · IPC B64C1/06 (2) · IPC B64C25/00 (2) · IPC B64C23/00 (2) · IPC B64C3/38 (2) · IPC B64C11/34 (2)
CPCs:
CPC B64C3/00 (11) · CPC B64C2700/6235 (10) · CPC B64C17/00 (6) · CPC B64C2700/6256 (4) · CPC B64C35/00 (4) · CPC B64C2001/0063 (4) · CPC B64C13/00 (4) · CPC B64C3/18 (3)
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