Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
  • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection

Applications Claiming Priority (1)

Publications (1)

Family

ID=5793550

Family Applications (1)

Country Status (5)

• 0
  • BE BE432577D patent/BE432577A/xx unknown
  • NL NL54243D patent/NL54243C/xx active
• 1939
  • 1939-02-04 US US254581A patent/US2356418A/en not_active Expired - Lifetime
  • 1939-02-04 CH CH207146D patent/CH207146A/de unknown
  • 1939-02-06 FR FR849946D patent/FR849946A/fr not_active Expired

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