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Patents > Publication date: 1909 & First filing: Yes & Number of claims: 2-3

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Inventors:
None (4) · Eduard Penkala (2) · Rudolf Penkala (2)
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None (4) · Eduard Penkala (2) · Rudolf Penkala (2)
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Tech fields:
Airplane (13) · Design (10) · propulsion (9) · Stability (8) · Propellers (8) · Wings (7) · Subsystem (6) · Control (6) · None (6) · Construction (5) · Frame (4) · steering (4) · Rudder (4) · Flapping (4) · navigation (4) · LTA (4) · ascension (3) · lift (3)
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CPCs:
None (5) · CPC B64C39/00 (5) · CPC B64C1/00 (5) · CPC B64C17/00 (3) · CPC B64C33/02 (3) · CPC B64C2700/6295 (3) · CPC B64C2700/6228 (3) · CPC B64C23/005 (3) · CPC B64C2700/6274 (3) · CPC B64B1/00 (2) · CPC B64C2700/6212 (2) · CPC B64C33/00 (2)
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