US PATENT SUBCLASS 137 / 828
.~.~.~ Acoustical or thermal energy

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


137 /   HD   FLUID HANDLING

803  DF  FLOW AFFECTED BY FLUID CONTACT, ENERGY FIELD OR COANDA EFFECT (E.G., PURE FLUID DEVICE OR SYSTEM) {11}
825  DF  .~ Means to regulate or vary operation of device {3}
827  DF  .~.~ By non-fluid energy field affecting input (e.g., transducer) {1}
828.~.~.~ Acoustical or thermal energy

DEFINITION

Classification: 137/828

(under subclass 827) Device wherein the force comprises sound waves or heat waves.

(1) Note. The generation of "compressional" waves by a vibrating diaphragm has been considered as equivalent to the generation of sound waves, and patents have been placed herein on that basis.

SEE OR SEARCH CLASS

181, Acoustics, for means generating acoustical signals.