CPC Subgroup
F21K 9/278 Arrangement or mounting of circuit elements integrated in the light source
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 two fittings for each light source, e.g. for substitution of fluorescent tubes > Arrangement or mounting of circuit elements integrated in the light source
Top Applicants
Top 10 applicants by patent filingsfor 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