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PCE
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DIFF Subgroup
H01J 29/18

Luminescent screens

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group > Electrodes; Screens; Mounting, supporting, spacing, or insulating thereof > Screens on, or from, which an image or pattern is formed, picked-up, converted, or stored > Luminescent screens

CPC:

Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00 > Electrodes; Screens; Mounting, supporting, spacing or insulating thereof > Screens on or from which an image or pattern is formed, picked up, converted or stored > Luminescent screens

Of 10 combined children, 7 exist in both systems.

3 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

Child Classifications

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  • H01J 29/182 CPC only CPC only
  • H01J 29/185 CPC only CPC only
  • H01J 29/187 CPC only CPC only
  • H01J 29/20 characterised by the luminescent material IPC+CPC Available in IPC and CPC
  • H01J 29/24 Supports for luminescent material IPC+CPC Available in IPC and CPC
  • H01J 29/26 with superimposed luminescent layers IPC+CPC Available in IPC and CPC
  • H01J 29/28 with protective, conductive or reflective layers IPC+CPC Available in IPC and CPC
  • H01J 29/34 provided with permanent marks or references 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