DIFF Subgroup
B24B 11/08 acting by the circumference
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor > for grinding balls > involving grinding wheels > acting by the circumference
CPC:
Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor (specially designed for optical surfaces B24B13/00, for seat surfaces B24B15/00) > for grinding balls > involving grinding wheels > acting by the circumference
No child classifications to compare. This is a leaf node in both IPC and CPC.
Top Applicants
Top Applicants (IPC)
Class B24,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO ABRASIVE SYSTEM 3,084
- APPLIED MATERIALS US 1,570
- EBARA CORPORATION JP 1,393
- DISCO CORPORATION JP 1,368
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,270
- EBARA CORPORATION 1,016
- FUJIMI JP 829
- ZHEJIANG UNIVERSITY OF TECHNOLOGY 804
- ROBERT BOSCH DE 803
- SAINT-GOBAIN ABRASIVES US 781
Top Applicants (CPC)
Class B24,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO CORPORATION JP 2,092
- APPLIED MATERIALS US 1,813
- EBARA CORPORATION JP 1,804
- 3M INNOVATIVE PROPERTIES COMPANY (MINNESOTA MINING AND MANUFACTURING INNOVATIVE PROPERTIES COMPANY) US 1,329
- ROBERT BOSCH DE 863
- FUJIMI JP 858
- SAINT-GOBAIN ABRASIVES US 833
- EBARA CORPORATION 810
- SAINT-GOBAIN ABRASIVES FR 782
- DISCO ABRASIVE SYSTEM 735