for spacing, for cross levelling; for laying-out curves

Introduced: September 1968

Title

Titles differ between systems:

IPC: for spacing; for cross levelling; for laying-out curves

CPC: for spacing, for cross levelling; for laying-out curves

Full Title

Full titles differ between systems:

IPC:

Applications of measuring apparatus or devices for track-building purposes > for spacing; for cross levelling; for laying-out curves

CPC:

Applications of measuring apparatus or devices for track-building purposes (apparatus on locomotives or cars to indicate or record bad track sections B61K9/00; measuring angles, linear dimensions, or irregularities in general G01B, G01C) > for spacing, for cross levelling; for laying-out curves

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

Child Classifications

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E01B 35/04 Wheeled apparatus IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class E01,2013–2023, worldwide · Source: EPO PATSTAT

CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 2,096
CHANG AN UNIVERSITY 1,878
ROAD & BRIDGE INTERNATIONAL COMPANY 1,796
CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 1,493
CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 1,327
CCCC FIRST HIGHWAY ENGINEERING GROUP COMPANY 1,133
CCCC SECOND HARBOUR ENGINEERING COMPANY 1,029
PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 935
TONGJI UNIVERSITY 899
CATERPILLAR PAVING PRODUCTS US 868

Top Applicants (CPC)

Class E01,2013–2023, worldwide · Source: EPO PATSTAT

PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 998
CATERPILLAR PAVING PRODUCTS US 937
CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 869
WIRTGEN DE 740
CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 685
CHANG AN UNIVERSITY 615
CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 613
SOUTHEAST UNIVERSITY 562
TONGJI UNIVERSITY 500
ROAD & BRIDGE INTERNATIONAL COMPANY 491