with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Reciprocating-piston liquid engines > with multiple cylinders, characterised by the number or arrangement of cylinders > with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis

CPC:

Reciprocating-piston liquid engines > with multiple-cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C1/22; of flexible-wall type F03C7/00) > with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis

Of 4 combined children, 0 exist in both systems.

4 codes are CPC-only extensions.

Child Classifications

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F03C 1/0602 +2 CPC CPC only CPC only
F03C 1/061 +3 CPC CPC only CPC only
F03C 1/0636 +4 CPC CPC only CPC only
F03C 1/0678 +6 CPC CPC only CPC only

Top Applicants

Top Applicants (IPC)

Class F03,2013–2023, worldwide · Source: EPO PATSTAT

VESTAS DK 3,539
WOBBEN PROPERTIES DE 2,922
SIEMENS GAMESA RENEWABLE ENERGY DK 2,747
GE (GENERAL ELECTRIC COMPANY) US 2,356
BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 1,228
SIEMENS DE 886
SGCC(STATE GRID CORPORATION OF CHINA) 831
HUANENG CLEAN ENERGY RESEARCH INSTITUTE 785
MING YANG SMART ENERGY GROUP. 652
LM WIND POWER DK 600

Top Applicants (CPC)

Class F03,2013–2023, worldwide · Source: EPO PATSTAT

VESTAS DK 3,718
WOBBEN PROPERTIES DE 3,602
SIEMENS GAMESA RENEWABLE ENERGY DK 3,016
GE (GENERAL ELECTRIC COMPANY) US 2,594
SIEMENS DE 1,082
BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY 709
LM WIND POWER DK 671
WOBBEN PROPERTIES 660
SENVION DE 555
BEIJING GOLDWIND SCIENCE & CREATION WINDPOWER EQUIPMENT COMPANY CN 536