Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
  • H04R1/00—Details of transducers, loudspeakers or microphones
  • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
  • H04R1/1008—Earpieces of the supra-aural or circum-aural type

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Acoustics & Sound (AREA)
• Signal Processing (AREA)
• Telephone Set Structure (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7986540

Family Applications (1)

Country Status (4)

• 0
  • BE BE410671D patent/BE410671A/xx unknown
• 1935
  • 1935-07-29 CH CH190273D patent/CH190273A/de unknown
  • 1935-08-01 FR FR793231D patent/FR793231A/fr not_active Expired
  • 1935-08-19 US US36915A patent/US2134084A/en not_active Expired - Lifetime

Also Published As

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