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IPC Subgroup
H01J 23/2

Cavity resonators; Adjustment or tuning thereof

Introduced: September 1968

Last revised: January 2006

Full Title

Details of transit-time tubes of the types covered by group > Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge > Resonators > Cavity resonators; Adjustment or tuning thereof

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS

2 direct subcodes

Child Classifications

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  • H01J 23/207 Tuning of single resonator
  • H01J 23/213 Simultaneous tuning of more than one resonator, e.g. resonant cavities of a magnetron

Top Applicants

Top 10 applicants by patent filingsfor class H01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
  2. SAMSUNG ELECTRONICS COMPANY KR 42,206
  3. LG CHEM KR 21,383
  4. APPLIED MATERIALS US 20,441
  5. LG ENERGY SOLUTION KR 20,279
  6. SAMSUNG DISPLAY KR 19,725
  7. CHINESE ACADEMY OF SCIENCES 19,400
  8. TOYOTA MOTOR CORPORATION 18,819
  9. SGCC(STATE GRID CORPORATION OF CHINA) 18,082
  10. TOKYO ELECTRON JP 17,634