US PATENT SUBCLASS 244 / 20
.~.~ Feathering

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


244 /   HD   AERONAUTICS

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

DEFINITION

Classification: 244/20

(under subclass 19) Aeronautical machines, in which the arrangement of the blades of the paddle wheels is varied during the rotation of the paddle wheel.