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IPC Subgroup
H01K 9/02

to provide substitution in the event of failure of one of the bodies

Introduced: September 1968

Last revised: January 2006

Full Title

Lamps having two or more incandescent bodies separately heated > to provide substitution in the event of failure of one of the bodies

Classification Context

Section:
ELECTRICITY
Class:
ELECTRIC ELEMENTS
Subclass:
ELECTRIC INCANDESCENT LAMPS

2 direct subcodes

Child Classifications

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  • H01K 9/04 with built-in manually-operated switch
  • H01K 9/06 with built-in device, e.g. switch, for automatically completing circuit of reserve body

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