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PCE
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DIFF Subgroup
B24B 19/26

for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads (grinding of spherical surfaces in general B24B11/00, of optical surfaces on lenses or surfaces of similar shape on other work B24B13/00)

Introduced: September 1968

Title

Titles differ between systems:

IPC: for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads

CPC: for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads (grinding of spherical surfaces in general B24B11/00, of optical surfaces on lenses or surfaces of similar shape on other work B24B13/00)

Full Title

Full titles differ between systems:

IPC:

Single purpose machines or devices for particular grinding operations not covered by any other main group > for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads

CPC:

Single-purpose machines or devices for particular grinding operations not covered by any other main group (tapering, chamfering, or relief cutting of taps or reamers B24B3/20, B24B3/22, grinding screw threads B23G) > for grinding workpieces with arcuate surfaces, e.g. parts of car bodies, bumpers or magnetic recording heads (grinding of spherical surfaces in general B24B11/00, of optical surfaces on lenses or surfaces of similar shape on other work B24B13/00)

Additional Content IPC

Grinding of spherical surfaces in general Of optical surfaces on lenses or surfaces of similar shape on other work

Of 2 combined children, 1 exist in both systems.

1 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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  • B24B 19/265 CPC only CPC only
  • B24B 19/28 for grinding shoes or linings of drum brakes (of brake drum hubs B24B5/06, of brake discs B24B7/17) 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