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Patents > Inventors : Howard de Walden or None & Inventor country: DE & National tech categories : HU V/h or RU Group V or USPC 244/22 & Number of diagram pages: 1-2

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Airship (25) · airplane (22) · construction (20) · design (18) · frame (15) · LTA (12) · Subsystem (11) · propellers (8) · military (8) · Biplane (7) · aerodynamics (6) · Texture (5) · steering (5) · Infrastructure (5) · Control (5) · motors (5) · gas (4) · Propulsion (4) · wheels (4) · Balloons (4)
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None (20)
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None (23) · Patent DE-1915-04-13 Luft Fahrzeug G.m.b.H. (2) · Patent DE-1907-202942 (2)
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