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DIFF Subgroup
B63H 21/02

the vessels being steam-driven (B63H21/18 takes precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: the vessels being steam-driven

CPC: the vessels being steam-driven (B63H21/18 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Use of propulsion power plant or units on vessels > the vessels being steam-driven

CPC:

Use of propulsion power plant or units on vessels > the vessels being steam-driven (B63H21/18 takes precedence)

IPC and CPC are identically structured here. All 4 subcodes exist in both systems.

Child Classifications

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  • B63H 21/04 relating to positive-displacement steam engines IPC+CPC Available in IPC and CPC
  • B63H 21/06 relating to steam turbines IPC+CPC Available in IPC and CPC
  • B63H 21/08 relating to steam boilers IPC+CPC Available in IPC and CPC
  • B63H 21/10 relating to condensers or engine-cooling fluid heat-exchangers IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B63,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG HEAVY INDUSTRIES KR 5,719
  2. DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 4,684
  3. HYUNDAI HEAVY INDUSTRIES COMPANY KR 3,015
  4. ZHEJIANG OCEAN UNIVERSITY 1,359
  5. HUDONG-ZHONGHUA SHIPBUILDING (GROUP) COMPANY 1,221
  6. HARBIN ENGINEERING UNIVERSITY 1,175
  7. SHANGHAI WAIGAOQIAO SHIPBUILDING COMPANY 1,129
  8. CSSC HUANGPU WENCHONG SHIPBUILDING COMPANY 1,113
  9. GUANGZHOU SHIPYARD INTERNATIONAL COMPANY 1,073
  10. JIANGSU UNIVERSITY OF SCIENCE AND TECHNOLOGY 963

Top Applicants (CPC)

Class B63,2013–2023, worldwide · Source: EPO PATSTAT

  1. SAMSUNG HEAVY INDUSTRIES KR 4,830
  2. DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY KR 4,093
  3. HYUNDAI HEAVY INDUSTRIES COMPANY KR 2,639
  4. GAZ TRANSPORT ET TECHNIGAZ FR 1,037
  5. SHANGHAI WAIGAOQIAO SHIPBUILDING COMPANY 827
  6. HARBIN ENGINEERING UNIVERSITY 811
  7. GUANGZHOU SHIPYARD INTERNATIONAL COMPANY 808
  8. HUDONG-ZHONGHUA SHIPBUILDING (GROUP) COMPANY 784
  9. YAMAHA MOTOR COMPANY JP 731
  10. THYSSEN KRUPP DE 727