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DIFF Subclass Not Allocatable
B61D

BODY DETAILS OR KINDS OF RAILWAY VEHICLES (vehicles in general B60; adaptation of vehicles to special systems B61B; underframes B61F)

Introduced: September 1968

Description

B61D covers the structural design, construction details, and classification of railway vehicle bodies, including passenger cars, freight wagons, and specialized train units. This subclass encompasses bodywork components such as frames, walls, roofs, floors, doors, windows, couplings, and interior fittings that define the physical form and functional characteristics of rail vehicles. It includes provisions for different vehicle types—such as coaches, dining cars, sleeping cars, and cargo wagons—as well as safety and comfort features integrated into the body structure. Adjacent classes address propulsion systems (B61C), running gear and suspension (B61E), and control/braking mechanisms (B61H), whereas B61D focuses specifically on the vehicle envelope and body-level design elements.

Title

Titles differ between systems:

IPC: BODY DETAILS OR KINDS OF RAILWAY VEHICLES

CPC: BODY DETAILS OR KINDS OF RAILWAY VEHICLES (vehicles in general B60; adaptation of vehicles to special systems B61B; underframes B61F)

Full Title

Full titles differ between systems:

IPC:

BODY DETAILS OR KINDS OF RAILWAY VEHICLES

CPC:

BODY DETAILS OR KINDS OF RAILWAY VEHICLES (vehicles in general B60; adaptation of vehicles to special systems B61B; underframes B61F)

IPC and CPC are identically structured here. All 24 subcodes exist in both systems.

12 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • B61D 25/00 Window arrangements peculiar to rail vehicles (vehicle window arrangements in general B60J; cleaning vehicle windows B60S; heating arrangements specially adapted for transparent or reflecting areas H05B3/84) IPC+CPC Available in IPC and CPC
  • B61D 29/00 Lighting IPC+CPC Available in IPC and CPC
  • B61D 31/00 Sleeping accommodation IPC+CPC Available in IPC and CPC
  • B61D 43/00 Devices for using the energy of the movements of the vehicles IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B61,2013–2023, worldwide · Source: EPO PATSTAT

  1. SIEMENS MOBILITY DE 2,749
  2. CRRC QINGDAO SIFANG COMPANY 2,215
  3. SIEMENS DE 1,941
  4. ALSTOM TRANSPORT TECHNOLOGIES FR 1,514
  5. BYD COMPANY 1,371
  6. CRRC CHANGCHUN RAILWAY VEHICLES COMPANY 1,205
  7. CRRC ZHUZHOU LOCOMOTIVE COMPANY 1,165
  8. CRRC TANGSHAN COMPANY 1,119
  9. BOMBARDIER TRANSPORTATION DE 1,001
  10. SOUTHWEST JIAOTONG UNIVERSITY 958

Top Applicants (CPC)

Class B61,2013–2023, worldwide · Source: EPO PATSTAT

  1. SIEMENS MOBILITY DE 2,967
  2. SIEMENS DE 2,133
  3. ALSTOM TRANSPORT TECHNOLOGIES FR 1,691
  4. CRRC QINGDAO SIFANG COMPANY 1,100
  5. BOMBARDIER TRANSPORTATION DE 1,085
  6. MITSUBISHI ELECTRIC CORPORATION JP 880
  7. BYD COMPANY 821
  8. KRRI KR 761
  9. HITACHI JP 752
  10. CRRC ZHUZHOU LOCOMOTIVE COMPANY 721