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CPC Main Group
H01F 30/00

Fixed transformers not covered by group H01F19/00

Filing statistics

CPC H01F 30/00 belongs to the parent subclass H01F, which recorded 154,717 patent applications worldwide between 2013 and 2023. Annual filings grew from 9,653 in 2013 to 13,752 in 2023 (+42%), peaking at 17,056 applications in 2020. The most active applicants in class H01 are SAMSUNG ELECTRONICS COMPANY (37,897 applications), TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY (36,116 applications) and APPLIED MATERIALS (21,640 applications).

Source: EPO PATSTAT, worldwide filings

3 direct subcodes

Child Classifications

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  • H01F 30/02 Auto-transformers
  • H01F 30/04 having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies

Top Applicants

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

  1. SAMSUNG ELECTRONICS COMPANY KR 37,897
  2. TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
  3. APPLIED MATERIALS US 21,640
  4. LG ENERGY SOLUTION KR 20,770
  5. LG CHEM KR 19,835
  6. TOKYO ELECTRON JP 18,519
  7. ROBERT BOSCH DE 14,595
  8. INTEL CORPORATION US 13,580
  9. MURATA MANUFACTURING COMPANY JP 12,151
  10. SAMSUNG SDI COMPANY KR 12,080