US PATENT SUBCLASS 324 / 394
.~.~ With cathode-ray tube display

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}
393  DF  .~ In situ testing of spark plug {5}
394.~.~ With cathode-ray tube display

DEFINITION

Classification: 324/394

With cathode-ray tube display:

(under subclass 393) Subject matter having a cathode-ray tube (CRT) display or a drive circuit for a CRT responsive to an electrical ignition system to display the waveform generated by the ignition system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379, for the general use of a CRT in the testing of internal-combustion engine ignition systems.