|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

TRANSPORTING

|  | B64 |
AIRCRAFT; AVIATION; COSMONAUTICS

|  | B64B |
LIGHTER-THAN-AIR AIRCRAFT (ground installations for aircraft in general Fulltext... Hierarchy... Expanded...B64F)

|  | B64C |
AEROPLANES; HELICOPTERS (air-cushion vehicles Fulltext... Hierarchy... Expanded...B60V)

|  | B64C |
Note(s) As far as possible, an invention is classified primarily according to constructional features; classification according to particular kinds of aircraft is normally regarded as being of secondary importance, except in cases where this is understood to be the characteristic feature.

|  | B64D |
EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS

|  | B64F |
GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS

|  | B64F |
Note(s) In this sub-class, the term "installations" embraces equipment, including mobile equipment, peculiar to use in connection with aircraft and not fitted thereto. The term "ground installations" in this sub-class embraces waterborne installations.

|  | B64G |
COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR (apparatus for, or methods of, winning materials from extraterrestrial sources Fulltext... Hierarchy... Expanded...E21C 51/00)

|  | B64G |
Note(s) In this sub-class, the term "cosmonautics" includes all transport outside the earth's atmosphere, and thus includes artificial earth satellites, and interplanetary and interstellar travel. This sub-class deals only with vehicles, equipment, etc., which are peculiarly adapted for cosmonautics. Thus, vehicles and equipment applicable to both cosmonautics and aeronautics are classified in the appropriate aeronautical sub-class of class Fulltext... Hierarchy... Expanded...B64.