B64B1/00	7	Lighter-than-air aircraft	B64B1/00	B64B1/00		1616
B64B1/005	8	{Arrangements for landing or taking-off, e.g. alighting gear}	B64B1/00	B64B1/00		156
B64B1/02	8	Non-rigid airships (B64B1/58 takes precedence; balloons B64B1/40)	B64B1/02	B64B1/02		189
B64B1/04	9	the profile being maintained by ties or cords connecting opposite surfaces	B64B1/04	B64B1/04		28
B64B1/06	8	Rigid airships; Semi-rigid airships (B64B1/58 takes precedence)	B64B1/06	B64B1/06		483
B64B1/08	9	Framework construction	B64B1/08	B64B1/08		235
B64B1/10	9	Tail unit construction (B64B1/12 takes precedence)	B64B1/10	B64B1/10		58
B64B1/12	9	Movable control surfaces	B64B1/12	B64B1/12		101
B64B1/14	9	Outer covering	B64B1/14	B64B1/14		167
B64B1/16	10	rigid	B64B1/16	B64B1/16		32
B64B1/18	10	Attachment to structure	B64B1/18	B64B1/18		20
B64B1/20	9	provided with wings or stabilising surfaces {(tail unit construction B64B1/10; movable control surfaces B64B1/12)}	B64B1/20	B64B1/20		196
B64B1/22	9	Arrangement of cabins or gondolas	B64B1/22	B64B1/22		260
B64B1/24	9	Arrangement of propulsion plant (B64B1/34 takes precedence)	B64B1/24	B64B1/24		217
B64B1/26	10	housed in ducts	B64B1/26	B64B1/26		79
B64B1/28	10	housed in nacelles	B64B1/28	B64B1/28		31
B64B1/30	10	Arrangement of propellers	B64B1/30	B64B1/30		219
B64B1/32	11	surrounding hull	B64B1/32	B64B1/32		135
B64B1/34	11	of lifting propellers	B64B1/34	B64B1/34		125
B64B1/36	9	Arrangement of jet reaction apparatus for propulsion or directional control	B64B1/36	B64B1/36		74
B64B1/38	9	Controlling position of centre of gravity	B64B1/38	B64B1/38		69
B64B1/40	8	Balloons (B64B1/58 takes precedence; toy balloons A63H27/10)	B64B1/40	B64B1/40		1263
B64B1/42	9	Construction or attachment of stabilising surfaces	B64B1/42	B64B1/42		75
B64B1/44	9	adapted to maintain predetermined altitude	B64B1/44	B64B1/44		111
B64B1/46	9	associated with apparatus to cause bursting	B64B1/46	B64B1/46		32
B64B1/48	10	to enable load to be dropped by parachute	B64B1/48	B64B1/48		28
B64B1/50	9	Captive balloons	B64B1/50	B64B1/50		504
B64B1/52	10	attaching trailing entanglements	B64B1/52	B64B1/52		74
B64B1/54	10	connecting two or more balloons in superimposed relationship	B64B1/54	B64B1/54		31
B64B1/56	10	stabilised by rotary motion	B64B1/56	B64B1/56		8
B64B1/58	8	Arrangements or construction of gas-bags; Filling arrangements	B64B1/58	B64B1/58		1414
B64B1/60	9	Gas-bags surrounded by separate containers of inert gas	B64B1/60	B64B1/60		293
B64B1/62	9	Controlling gas pressure, heating, cooling, or discharging gas	B64B1/62	B64B1/62		953
B64B1/64	9	Gas valve operating mechanisms	B64B1/64	B64B1/64		285
B64B1/66	8	Mooring attachments	B64B1/66	B64B1/66		401
B64B1/68	8	Water flotation gear	B64B1/68	B64B1/68		26
B64B1/70	8	Ballasting arrangements	B64B1/70	B64B1/70		150
B64B2201/00	7	Hybrid airships, i.e. airships where lift is generated aerodynamically and statically	CPCONLY	B64B2201/00		245
