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DIFF Subclass Not Allocatable
H01S

DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

Introduced: September 1968

Description

H01S covers laser devices and stimulated emission sources operating across electromagnetic spectrum ranges from ultraviolet through microwave frequencies. The subclass encompasses laser construction (optical cavities, active media, pumping mechanisms), laser types (solid-state, gas, semiconductor, fiber, dye lasers), and masers and related devices operating at non-optical wavelengths. Related amplification and generation of electromagnetic radiation through stimulated emission principles fall within this classification, while specific laser applications in materials processing, measurement, or communications are typically addressed in specialized classes (B, G, H sections).

Additional Content IPC

Glossary

active medium a medium providing for optical gain by the stimulated emission effect when excited by an excitation (pump) energy source laser lasers It is the acronym for “light amplification by stimulated emission of radiation” but it also refers, in broader sense, to any device using stimulated emission of radiation by excited atoms or molecules. Hence, for example, the expressions “semiconductor laser”, “dye laser”, “optical fibre laser” or “X-ray laser”. pumping the process of providing the active medium for excitation energy

Limiting references

Superluminescent diodes

Application references

Eye surgery using laser Radiation therapy using laser light Sintering by using laser light Working by laser beam, e.g. welding, cutting or boring Joining of preformed parts by using laser light Laser printers , Ring laser gyrometers; Fibre laser gyrometers , Investigating or analysing colour or spectral properties of materials by using tunable lasers Apparatus specially adapted for photomechanical, e.g. photolithographic, production of textured or patterned surfaces Laser heads for recording or reproducing Laser recording associated with non-optical reproducing, or laser reproducing associated with non-optical recording Trimming by laser in the manufacture of resistors Transmission systems employing light, e.g. all-optical repeaters , Photolithographic processing on semiconductor bodies

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

Note: 4 CPC extensions are marked as secondary classification only.

3 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • H01S 2303/00 Pumping wavelength 2nd only CPC only CPC only
  • H01S 4/00 Devices using stimulated emission of electromagnetic radiation in wave ranges other than those covered by groups H01S1/00, H01S3/00 or H01S5/00, e.g. phonon masers, X-ray lasers or gamma-ray lasers IPC+CPC Available in IPC and CPC

Top Applicants

Top Applicants (IPC)

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

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

Top Applicants (CPC)

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

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