US PATENT SUBCLASS 244 / 19
.~ Paddle wheel sustained

Current as of: June, 1999
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244 /   HD   AERONAUTICS

4 R  DF  AIRCRAFT, HEAVIER-THAN-AIR {14}
19.~ Paddle wheel sustained {1}
20  DF  .~.~> Feathering

DEFINITION

Classification: 244/19

Aeronautical machines sustained by the downward thrust developed by rotating paddle wheels. These paddle wheels may also be the propelling agents.

(1) Note. For paddle wheels on machines having also sustaining wings, see this class, subclass 9.

(2) Note. For machines having feathering paddle wheels, see this class, subclass 20.

(3) Note. For lighter-than-air craft sustained also by paddle wheels, see this class, subclass 27.