[n: Devices For Transmitting, Directing, Amplifying Sound (in General G10k11/18)] {g11b 3/00b} Patents (Class G9B/3.003)

Cross-Reference Art Collections

[n: through hollow arms] {g11b 3/00b1} (Class G9B/3.004)
[n: using horns] {g11b 3/00b2} (Class G9B/3.005)

There are no patents to show for this class.