B28D 1/26 by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive tools B25D)
Introduced: September 1968
Title
Titles differ between systems:
IPC: by impact tools, e.g. by chisels or other tools having a cutting edge
CPC: by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive tools B25D)
Full Title
Full titles differ between systems:
Working stone or stone-like materials, e.g. brick, concrete, not provided for elsewhere; Machines, devices, tools therefor > by impact tools, e.g. by chisels or other tools having a cutting edge
Working stone or stone-like materials, e.g. brick, concrete , not provided for elsewhere; Machines, devices, tools therefor (fine working of gems, jewels, crystals B28D5/00; working by grinding or polishing B24; devices or means for dressing or conditioning abrasive surfaces B24B53/00) > by impact tools, e.g. by chisels or other tools having a cutting edge (portable percussive tools B25D)
Of 2 combined children, 1 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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Top Applicants
Top Applicants (IPC)
Class B28,2013–2023, worldwide · Source: EPO PATSTAT
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 868
- QINGDAO GAOCE TECHNOLOGY COMPANY 678
- DISCO CORPORATION JP 500
- ZHOU ZHAODI 500
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 456
- HILTI LI 455
- CORNING US 407
- UNITED STATES GYPSUM COMPANY US 375
- ZHENGZHOU YUAN DONG REFRACTORIES COMPANY 370
- HUNAN SANY KUAIERJU RESIDENTIAL INDUSTRY COMPANY 351
Top Applicants (CPC)
Class B28,2013–2023, worldwide · Source: EPO PATSTAT
- DISCO CORPORATION JP 1,471
- HILTI LI 575
- CORNING US 544
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY JP 518
- UNITED STATES GYPSUM COMPANY US 485
- DISCO ABRASIVE SYSTEM 459
- GE (GENERAL ELECTRIC COMPANY) US 454
- MITSUBOSHI DIAMOND INDUSTRIAL COMPANY 439
- DISCO CORPORATION 403
- NGK INSULATORS JP 308