Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
B63G 8/22

Adjustment of buoyancy by water ballasting; Emptying equipment for ballast tanks

Introduced: September 1968

Last revised: January 2006

Full Title

Underwater vessels, e.g. submarines > Control of attitude or depth > Adjustment of buoyancy by water ballasting; Emptying equipment for ballast tanks

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
Subclass:
OFFENSIVE OR DEFENSIVE ARRANGEMENTS ON VESSELS; MINE-LAYING; MINE-SWEEPING; SUBMARINES; AIRCRAFT CARRIERS

Filing statistics

IPC B63G 8/22 belongs to the parent subclass B63G, which recorded 13,273 patent applications worldwide between 2013 and 2023. Annual filings grew from 693 in 2013 to 1,542 in 2023 (+123%). The most active applicants in class B63 are SAMSUNG HEAVY INDUSTRIES (5,719 applications), DAEWOO SHIPBUILDING & MARINE ENGINEERING COMPANY (4,684 applications) and HYUNDAI HEAVY INDUSTRIES COMPANY (3,015 applications).

Source: EPO PATSTAT, worldwide filings

Top Applicants

Top 10 applicants by patent filingsfor 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