Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
DIFF Subgroup
G10K 11/22

for conducting sound through hollow pipes, e.g. speaking tubes

Introduced: January 1980

Full Title

Full titles differ between systems:

IPC:

Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general > Methods or devices for transmitting, conducting or directing sound > for conducting sound through hollow pipes, e.g. speaking tubes

CPC:

Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general > Methods or devices for transmitting, conducting or directing sound (G10K11/02, G10K11/36 take precedence) > for conducting sound through hollow pipes, e.g. speaking tubes

No child classifications to compare. This is a leaf node in both IPC and CPC.