DIFF Main Group
F21L 4/00 Electric lighting devices with self-contained electric batteries or cells
Introduced: January 2000
Of 5 combined children, 4 exist in both systems.
1 codes are CPC-only extensions.
4 shared codes have differing titles between IPC and CPC.
IPC defines codes here since 2000.
Child Classifications
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- F21L 4/02 characterised by the provision of two or more light sources since 2000 +1 CPC IPC+CPC Available in IPC and CPC
- F21L 4/04 characterised by the provision of a light source housing portion adjustably fixed to the remainder of the device since 2000 +1 CPC IPC+CPC Available in IPC and CPC
- F21L 4/06 with the light source coupled to the remainder of the device solely by cable since 2000 IPC+CPC Available in IPC and CPC
- F21L 4/08 characterised by means for in situ recharging of the batteries or cells since 2000 +1 CPC IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class F21,2013–2023, worldwide · Source: EPO PATSTAT
- PANASONIC INTELLECTUAL PROPERTY 3,883
- VALEO VISION FR 2,797
- KOITO MANUFACTURING COMPANY 2,531
- OPPLE LIGHTING COMPANY 2,343
- SIGNIFY HOLDING NL 2,275
- TOSHIBA LIGHTING & TECHNOLOGY CORPORATION 1,982
- KOITO MANUFACTURING COMPANY JP 1,766
- LG INNOTEK COMPANY KR 1,651
- SUZHOU OPPLE LIGHTING COMPANY 1,633
- MITSUBISHI ELECTRIC CORPORATION 1,591
Top Applicants (CPC)
Class F21,2013–2023, worldwide · Source: EPO PATSTAT
- VALEO VISION FR 2,820
- SIGNIFY HOLDING NL 2,374
- KOITO MANUFACTURING COMPANY JP 1,890
- KOITO MANUFACTURING COMPANY 1,722
- LG INNOTEK COMPANY KR 1,624
- OSRAM DE 1,507
- LG ELECTRONICS KR 1,458
- PANASONIC INTELLECTUAL PROPERTY JP 1,433
- ZUMTOBEL LIGHTING AT 1,349
- PANASONIC INTELLECTUAL PROPERTY 1,275