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IPC Subgroup
B63H 23/34

Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts

Introduced: September 1968

Last revised: January 2006

Full Title

Transmitting power from propulsion power plant to propulsive elements > Other parts > Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts

Classification Context

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

1 direct subcode

Child Classifications

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  • B63H 23/35 Shaft braking or locking, i.e. means to slow or stop the rotation of the propeller shaft or to prevent the shaft from initial rotation

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