US PATENT SUBCLASS 324 / 401
.~.~ Using a pressure chamber

Current as of: June, 1999
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324 /   HD   ELECTRICITY: MEASURING AND TESTING

378  DF  INTERNAL-COMBUSTION ENGINE IGNITION SYSTEM OR DEVICE {12}
400  DF  .~ Spark plug removed or tested in a test fixture {1}
401.~.~ Using a pressure chamber

DEFINITION

Classification: 324/401

Using a pressure chamber:

(under subclass 400) Subject matter wherein the test fixture has a means for testing the plug under pressure.