US PATENT SUBCLASS 181 / 245
.~.~.~ Internally coated parts

Current as of: June, 1999
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181 /   HD   ACOUSTICS

175  DF  SOUND-MODIFYING MEANS {12}
212  DF  .~ Muffler, fluid conducting type {25}
244  DF  .~.~ Corrosion prevention {2}
245.~.~.~ Internally coated parts

DEFINITION

Classification: 181/245

Internally coated parts:

(under subclass 244) Subject matter wherein at least some of the fluid contacting surfaces of the conducting devices are coated so as to prevent corrosion.