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PCE
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DIFF Subgroup
B61D 7/24

Opening or closing means

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Hopper cars > Adaptations of hopper elements to railways > Closure elements for discharge openings > Opening or closing means

CPC:

Hopper cars (flat bottomed cars convertible into hoppers B61D3/06) > Adaptations of hopper elements to railways > Closure elements for discharge openings > Opening or closing means

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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  • B61D 7/26 mechanical IPC+CPC Available in IPC and CPC
  • B61D 7/28 hydraulic or pneumatic IPC+CPC Available in IPC and CPC
  • B61D 7/30 controlled by means external to cars 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