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DIFF Subgroup
B43L 1/04

Blackboards (; easels or stands for blackboards A47B97/04)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Blackboards

CPC: Blackboards (; easels or stands for blackboards A47B97/04)

Full Title

Full titles differ between systems:

IPC:

Repeatedly-usable boards or tablets for writing or drawing > Blackboards

CPC:

Repeatedly-usable boards or tablets for writing or drawing (drawing-boards B43L5/00) > Blackboards (; easels or stands for blackboards A47B97/04)

Of 4 combined children, 3 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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  • B43L 1/045 CPC only CPC only
  • B43L 1/06 rigid IPC+CPC Available in IPC and CPC
  • B43L 1/08 flexible IPC+CPC Available in IPC and CPC
  • B43L 1/10 Writing surfaces thereof IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B43,2013–2023, worldwide · Source: EPO PATSTAT

  1. PILOT CORPORATION 1,100
  2. MITSUBISHI PENCIL COMPANY 818
  3. SOCIETE BIC FR 380
  4. MITSUBISHI PENCIL COMPANY JP 371
  5. PILOT CORPORATION JP 273
  6. DELI GROUP COMPANY 249
  7. SHANGHAI M&G STATIONERY 176
  8. PENTEL 169
  9. ZEBRA PEN CORPORATION 153
  10. GUANGZHOU SHIRUI ELECTRICAL TECHNOLOGY COMPANY 124

Top Applicants (CPC)

Class B43,2013–2023, worldwide · Source: EPO PATSTAT

  1. SOCIETE BIC FR 422
  2. MITSUBISHI PENCIL COMPANY JP 381
  3. PILOT CORPORATION JP 299
  4. MITSUBISHI PENCIL COMPANY 213
  5. PILOT CORPORATION 100
  6. WACOM COMPANY JP 89
  7. STAEDTLER MARS & COMPANY DE 87
  8. KOTOBUKI JP 82
  9. CRAYOLA US 78
  10. SANFORD US 73