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DIFF Subgroup
H05K 3/34

by soldering

Introduced: September 1968

Full Title

Apparatus or processes for manufacturing printed circuits > Assembling printed circuits with electric components, e.g. with resistors > electrically connecting electric components or wires to printed circuits > by soldering

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

IPC defines codes here since 2026.

Child Classifications

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  • H05K 3/3405 CPC only CPC only
  • H05K 3/3447 Lead-in-hole components since 2026 IPC+CPC Available in IPC and CPC
  • H05K 3/3452 Solder masks since 2026 IPC+CPC Available in IPC and CPC
  • H05K 3/346 Solder materials or compositions specially adapted therefor since 2026 IPC+CPC Available in IPC and CPC
  • H05K 3/3489 Composition of fluxes; Application thereof; Other processes of activating the contact surfaces since 2026 IPC+CPC Available in IPC and CPC
  • H05K 3/3494 Heating processes for reflow soldering since 2026 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H05,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 7,201
  2. PANASONIC INTELLECTUAL PROPERTY 6,828
  3. SEMICONDUCTOR ENERGY LABORATORY COMPANY 3,988
  4. LG ELECTRONICS KR 3,564
  5. PANASONIC INTELLECTUAL PROPERTY JP 3,533
  6. SAMSUNG DISPLAY KR 3,310
  7. FUJI JP 2,870
  8. SAMSUNG ELECTRO-MECHANICS COMPANY KR 2,675
  9. GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORPORATION 2,665
  10. MURATA MANUFACTURING COMPANY JP 2,634

Top Applicants (CPC)

Class H05,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG ELECTRONICS COMPANY KR 9,981
  2. SAMSUNG DISPLAY KR 5,041
  3. LG ELECTRONICS KR 4,742
  4. PHILIP MORRIS PRODUCTS CH 4,411
  5. PANASONIC INTELLECTUAL PROPERTY JP 3,915
  6. PANASONIC INTELLECTUAL PROPERTY 3,471
  7. SAMSUNG ELECTRO-MECHANICS COMPANY KR 3,210
  8. MURATA MANUFACTURING COMPANY JP 3,191
  9. FUJI JP 2,987
  10. SIGNIFY HOLDING NL 2,907