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IPC Subgroup
B63H 1/14

Propellers

Introduced: September 1968

Last revised: January 2006

Full Title

Propulsive elements directly acting on water > of rotary type > with rotation axis substantially in propulsive direction > Propellers

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
Subclass:
MARINE PROPULSION OR STEERING

Related Keywords

SCREW(S) propellers for waterborne vessels

6 direct subcodes

Child Classifications

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  • B63H 1/15 having vibration damping means
  • B63H 1/16 having a shrouding ring attached to blades
  • B63H 1/18 with means for diminishing cavitation, e.g. supercavitation
  • B63H 1/26 Blades
  • B63H 1/28 Other means for improving propeller efficiency

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