US PATENT SUBCLASS 324 / 400
.~ Spark plug removed or tested in a test fixture

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.~ Spark plug removed or tested in a test fixture {1}
401  DF  .~.~> Using a pressure chamber

DEFINITION

Classification: 324/400

Spark plug removed or tested in a test fixture:

(under subclass 378) Subject matter wherein the spark plug is removed from the engine or placed in a test fixture to determine the condition of the plug.