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Patents > National tech categories : DE 77h.5 or USPC 244/22 & Number of text pages: 3-40

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Office:
Inventors:
None (6) · Adolphe-François-Joseph Doutre (2) · Ruter William Springer (2) · Rumpler-Werke G.m.b.H. in Berlin-Johannisthal (2) · René Arnoux (2) · John Emery Harriman, Jr. (2) · Julius Uherkovich de Uherkócz (2)
Inventor country:
Applicant person:
None (14) · Adolphe-François-Joseph Doutre (2) · Ruter William Springer (2) · John Emery Harriman, Jr. (2) · René Arnoux (2) · Julius Uherkovich de Uherkócz (2)
Applicant type:
Applicant is inventor:
Tech fields:
airplane (22) · frame (19) · flapping (16) · ornithopter (13) · propeller (10) · stability (9) · propulsion (9) · navigation (9) · airfoil (7) · hybrid (7) · design (7) · wings (6) · Tragfläche (6) · rudder (5) · construction (5) · landing (4) · None (4) · Control (4)
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Application number:
None (18)
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Citations from after 1930:
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