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Class Information
Number: 367/148
Name: Communications, electrical: acoustic wave systems and devices > Signal transducers > Underwater type > Exclusive-type transmitter > Electrically driven underwater bells or sirens
Description: Subject matter comprising either an electrically driven bell or an electrically driven siren.

Patents under this class:

Patent Number Title Of Patent Date Issued
8687464 Marine siren seismic source Apr. 1, 2014
5787052 Snap action rotary pulser Jul. 28, 1998
5583827 Measurement-while-drilling system and method Dec. 10, 1996
4852510 Scuba whistle Aug. 1, 1989
4514834 Expendable underwater acoustic projector Apr. 30, 1985
4332017 Mechanoacoustic transducer for use in transmitting high acoustic power densities into geological formations such as oil-saturated sandstone or shale May. 25, 1982
4324135 Speed indicator for fishing gear Apr. 13, 1982
4198706 Generation of low frequency sound under water Apr. 15, 1980
4007805 Cavity producing underwater sound source Feb. 15, 1977

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