specially designed for sharpening cutting edges

Introduced: September 1968

Full Title

Hand tools or other devices for non-rotary grinding, polishing, or stropping > specially designed for sharpening cutting edges

CPC subdivides this area 4x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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B24D 15/061 CPC only CPC only
B24D 15/063 CPC only CPC only
B24D 15/065 CPC only CPC only
B24D 15/066 CPC only CPC only
B24D 15/068 CPC only CPC only
B24D 15/08 of knives; of razors +4 CPC IPC+CPC Available in IPC and CPC
B24D 15/10 of safety-razor blades (devices with mechanically-operated parts B24B3/50) +1 CPC IPC+CPC Available in IPC and CPC

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

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