G01R31/25 - CPC Classification Index

ClassID:

171707 ⎘

G01R31/25 - CPC Classification

Classification description:

Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere; Testing of discharge tubes Testing of vacuum tubes

Sub-classes:

G01R31/252 » {Testing of electron multipliers, e.g. photo-multipliers} 0
G01R31/255 » {Testing of transit-time tubes, e.g. klystrons, magnetrons} 1
G01R31/257 » {Testing of beam-tubes, e.g. cathode-ray tubes, image pick-up tubes } 5

Recent Application in this class:

20170221659

2017-08-03

Device for monitoring the vacuum quality of a vacuum circuit breaker

20150355264

2015-12-10

Predicting the end of service life for a vacuum electron device

20150042345

2015-02-12

Thermionic valve tester

20140131436

2014-05-15

Robust fault diagnosis for electronic devices

20090237041

2009-09-24

Electric current measurement apparatus, voltage measurement apparatus and power supply apparatus

14014053

2016-05-17

Electrical arc trigger systems, methods, and apparatuses