DE147137C - - Google Patents

Info

Publication number
DE147137C
DE147137C DENDAT147137D DE147137DA DE147137C DE 147137 C DE147137 C DE 147137C DE NDAT147137 D DENDAT147137 D DE NDAT147137D DE 147137D A DE147137D A DE 147137DA DE 147137 C DE147137 C DE 147137C
Authority
DE
Germany
Prior art keywords
record
mica
contact
center
grains
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
DENDAT147137D
Other languages
German (de)
English (en)
Publication of DE147137C publication Critical patent/DE147137C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
DENDAT147137D Active DE147137C (online.php)

Publications (1)

Publication Number Publication Date
DE147137C true DE147137C (online.php)

Family

ID=414345

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT147137D Active DE147137C (online.php)

Country Status (1)

Country Link
DE (1) DE147137C (online.php)

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