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PCE
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DIFF Subgroup
B24B 7/16

for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings (for combined grinding of surfaces of revolution and adjacent plane surfaces on work B24B5/01; for grinding edges of bevels on work B24B9/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: for grinding end faces, e.g. of gauges, rollers, nuts or piston rings

CPC: for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings (for combined grinding of surfaces of revolution and adjacent plane surfaces on work B24B5/01; for grinding edges of bevels on work B24B9/00)

Full Title

Full titles differ between systems:

IPC:

Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor > Single-purpose machines or devices > for grinding end faces, e.g. of gauges, rollers, nuts or piston rings

CPC:

Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor (B24B21/00 takes precedence; honing of plane surfaces on work B24B33/055) > Single-purpose machines or devices (grinding tools or machines specially designed for use on assembled railway track E01B31/17) > for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings (for combined grinding of surfaces of revolution and adjacent plane surfaces on work B24B5/01; for grinding edges of bevels on work B24B9/00)

CPC subdivides this area 4x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

IPC defines codes here since 1985.

Child Classifications

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  • B24B 7/162 CPC only CPC only
  • B24B 7/165 CPC only CPC only
  • B24B 7/167 CPC only CPC only
  • B24B 7/17 for simultaneously grinding opposite and parallel end faces, e.g. double disc grinders since 1985 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class B24,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO ABRASIVE SYSTEM 3,084
  2. APPLIED MATERIALS US 1,570
  3. EBARA CORPORATION JP 1,393
  4. DISCO CORPORATION JP 1,368
  5. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,270
  6. EBARA CORPORATION 1,016
  7. FUJIMI JP 829
  8. ZHEJIANG UNIVERSITY OF TECHNOLOGY 804
  9. ROBERT BOSCH DE 803
  10. SAINT-GOBAIN ABRASIVES US 781

Top Applicants (CPC)

Class B24,2013–2023, worldwide · Source: EPO PATSTAT

  1. DISCO CORPORATION JP 2,092
  2. APPLIED MATERIALS US 1,813
  3. EBARA CORPORATION JP 1,804
  4. 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,329
  5. ROBERT BOSCH DE 863
  6. FUJIMI JP 858
  7. SAINT-GOBAIN ABRASIVES US 833
  8. EBARA CORPORATION 810
  9. SAINT-GOBAIN ABRASIVES FR 782
  10. DISCO ABRASIVE SYSTEM 735