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PCE
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DIFF Subgroup
F21K 9/23

Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

Introduced: January 2016

Full Title

Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers > Light sources comprising attachment means > Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings

IPC and CPC are identically structured here. All 5 subcodes exist in both systems.

2 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 2016.

Child Classifications

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  • F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb since 2016 IPC+CPC Available in IPC and CPC
  • F21K 9/233 specially adapted for generating a spot light distribution, e.g. for substitution of reflector lamps since 2016 IPC+CPC Available in IPC and CPC
  • F21K 9/235 Details of bases or caps, i.e. the parts that connect the light source to a fitting; Arrangement of components within bases or caps (F21K9/238 takes precedence) since 2016 IPC+CPC Available in IPC and CPC
  • F21K 9/237 Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases (F21K9/238 takes precedence) since 2016 IPC+CPC Available in IPC and CPC
  • F21K 9/238 Arrangement or mounting of circuit elements integrated in the light source since 2016 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class F21,2013–2023, worldwide · Source: EPO PATSTAT

  1. PANASONIC INTELLECTUAL PROPERTY 3,883
  2. VALEO VISION FR 2,797
  3. KOITO MANUFACTURING COMPANY 2,531
  4. OPPLE LIGHTING COMPANY 2,343
  5. SIGNIFY HOLDING NL 2,275
  6. TOSHIBA LIGHTING & TECHNOLOGY CORPORATION 1,982
  7. KOITO MANUFACTURING COMPANY JP 1,766
  8. LG INNOTEK COMPANY KR 1,651
  9. SUZHOU OPPLE LIGHTING COMPANY 1,633
  10. MITSUBISHI ELECTRIC CORPORATION 1,591

Top Applicants (CPC)

Class F21,2013–2023, worldwide · Source: EPO PATSTAT

  1. VALEO VISION FR 2,820
  2. SIGNIFY HOLDING NL 2,374
  3. KOITO MANUFACTURING COMPANY JP 1,890
  4. KOITO MANUFACTURING COMPANY 1,722
  5. LG INNOTEK COMPANY KR 1,624
  6. OSRAM DE 1,507
  7. LG ELECTRONICS KR 1,458
  8. PANASONIC INTELLECTUAL PROPERTY JP 1,433
  9. ZUMTOBEL LIGHTING AT 1,349
  10. PANASONIC INTELLECTUAL PROPERTY 1,275