US PATENT SUBCLASS 244 / 26
.~ Airship and helicopter sustained


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

24  DF  AIRCRAFT, LIGHTER-THAN-AIR {7}
26.~ Airship and helicopter sustained


DEFINITION

Classification: 244/26

(under subclass 24) Propelled aeronautical machines sustained by their buoyancy relative to the air, having also provision for sustentation or vertical lift by means of screw propellers arranged to develop a substantial component of thrust in a vertical direction.

(1) Note. For helicopters having also sustaining wings, see this class, subclass 6.

(2) Note. For helicopters without airplane wings, see this class, subclasses 17.11+.