to form prestressed circumferential reinforcements

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material > wherein the elements are reinforcing members > the elements being stressed > to form prestressed circumferential reinforcements

CPC:

Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; (B28B21/00 takes precedence; in units for prefabricated buildings B28B7/22) > wherein the elements are reinforcing members > the elements being stressed > to form prestressed circumferential reinforcements

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1974.

Child Classifications

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B28B 23/14 by wrapping, e.g. winding, apparatus since 1974 IPC+CPC Available in IPC and CPC
B28B 23/16 Prestressed reinforcing nets since 1974 IPC+CPC Available in 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