Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Tubular elements of cross-section which is non-circular

CPC: Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence)

Full Title

Full titles differ between systems:

IPC:

Tubular elements; Assemblies of tubular elements > Tubular elements of cross-section which is non-circular

CPC:

Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00) > Tubular elements of cross-section which is non-circular (F28F1/08, F28F1/10 take precedence)

CPC subdivides this area 3x more granularly than IPC with 3 additional codes.

3 codes are CPC-only extensions.

Note: 1 CPC extensions are marked as secondary classification only.

Child Classifications

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F28F 1/022 CPC only CPC only
F28F 1/025 CPC only CPC only
F28F 1/04 polygonal, e.g. rectangular +1 CPC IPC+CPC Available in IPC and CPC
F28F 1/06 crimped or corrugated in cross-section IPC+CPC Available in IPC and CPC
F28F 2001/027 2nd only CPC only CPC only

Top Applicants

Top Applicants (IPC)

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

VALEO SYSTEMES THERMIQUES FR 1,902
MITSUBISHI ELECTRIC CORPORATION JP 1,327
GREE ELECTRIC APPLIANCES 1,152
MAHLE INTERNATIONAL DE 999
ALFA LAVAL SE 960
HANON SYSTEMS KR 917
DENSO CORPORATION 905
DENSO CORPORATION JP 802
CHINESE ACADEMY OF SCIENCES 787
XIAN THERMAL POWER RESEARCH INSTITUTE COMPANY 762

Top Applicants (CPC)

Class F28,2013–2023, worldwide · Source: EPO PATSTAT

VALEO SYSTEMES THERMIQUES FR 1,945
MITSUBISHI ELECTRIC CORPORATION JP 1,518
MAHLE INTERNATIONAL DE 1,120
ALFA LAVAL SE 1,085
HANON SYSTEMS KR 939
DENSO CORPORATION JP 900
LG ELECTRONICS KR 861
HAMILTON SUNDSTRAND US 795
DAIKIN INDUSTRIES JP 608
DENSO CORPORATION 537