IPC Subgroup
G10D 7/04 with Helmholtz resonators, e.g. ocarinas
Introduced: September 1968
Last revised: January 2020
Full Title
General design of wind musical instruments > of the type wherein an air current is directed against a ramp edge > with Helmholtz resonators, e.g. ocarinas
Classification Context
- Section:
- PHYSICS
- Class:
- MUSICAL INSTRUMENTS; ACOUSTICS
- Subclass:
- STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR