by coherent light

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range > Processes or apparatus for excitation, e.g. pumping > using optical pumping > by coherent light

CPC:

Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range (semiconductors lasers H01S5/00) > Processes or apparatus for excitation, e.g. pumping > using optical pumping > by coherent light

CPC subdivides this area 7x more granularly than IPC with 17 additional codes.

17 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1990.

Child Classifications

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H01S 3/094003 +5 CPC CPC only CPC only
H01S 3/094026 CPC only CPC only
H01S 3/09403 CPC only CPC only
H01S 3/094034 CPC only CPC only
H01S 3/094038 CPC only CPC only
H01S 3/094042 +1 CPC CPC only CPC only
H01S 3/094049 +2 CPC CPC only CPC only
H01S 3/094061 CPC only CPC only
H01S 3/094065 CPC only CPC only
H01S 3/094069 CPC only CPC only
H01S 3/094073 CPC only CPC only
H01S 3/094076 CPC only CPC only
H01S 3/09408 CPC only CPC only
H01S 3/094084 CPC only CPC only
H01S 3/094088 CPC only CPC only
H01S 3/094092 CPC only CPC only
H01S 3/094096 CPC only CPC only
H01S 3/0941 of a laser diode since 1995 +1 CPC IPC+CPC Available in IPC and CPC
H01S 3/0943 of a gas laser since 1990 IPC+CPC Available in IPC and CPC
H01S 3/0947 of an organic dye laser since 1990 IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 43,574
SAMSUNG ELECTRONICS COMPANY KR 42,206
LG CHEM KR 21,383
APPLIED MATERIALS US 20,441
LG ENERGY SOLUTION KR 20,279
SAMSUNG DISPLAY KR 19,725
CHINESE ACADEMY OF SCIENCES 19,400
TOYOTA MOTOR CORPORATION 18,819
SGCC(STATE GRID CORPORATION OF CHINA) 18,082
TOKYO ELECTRON JP 17,634

Top Applicants (CPC)

Class H01,2013–2023, worldwide · Source: EPO PATSTAT

SAMSUNG ELECTRONICS COMPANY KR 37,897
TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY TW 36,116
APPLIED MATERIALS US 21,640
LG ENERGY SOLUTION KR 20,770
LG CHEM KR 19,835
TOKYO ELECTRON JP 18,519
ROBERT BOSCH DE 14,595
INTEL CORPORATION US 13,580
MURATA MANUFACTURING COMPANY JP 12,151
SAMSUNG SDI COMPANY KR 12,080