for grooving rollers

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Dressing mill discs or rollers > Machines > for grooving rollers

CPC:

Dressing mill discs or rollers (dressing the tools of sawing machines or sawing devices B23D63/00; treating the cutting members of cutting machines to facilitate cutting B26D7/08) > Machines > for grooving rollers

No child classifications to compare. This is a leaf node in both IPC and CPC.

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