IPC Main Group
H01J 23/00 Details of transit-time tubes of the types covered by group
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
6 direct subcodes
Child Classifications
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- H01J 23/02 Electrodes; Magnetic control means; Screens
- H01J 23/12 Vessels; Containers
- H01J 23/14 Leading-in arrangements; Seals therefor
- H01J 23/16 Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
- H01J 23/34 Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
- H01J 23/36 Coupling devices having distributed capacitance and inductance, structurally associated with the tube, for introducing or removing wave energy
Top Applicants
Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT
- TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
- SAMSUNG ELECTRONICS COMPANY KR 42,206
- LG CHEM KR 21,383
- APPLIED MATERIALS US 20,441
- LG ENERGY SOLUTION KR 20,279
- SAMSUNG DISPLAY KR 19,725
- CHINESE ACADEMY OF SCIENCES 19,400
- TOYOTA MOTOR CORPORATION 18,819
- SGCC(STATE GRID CORPORATION OF CHINA) 18,082
- TOKYO ELECTRON JP 17,634