Classifications

• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03G—CONTROL OF AMPLIFICATION
  • H03G5/00—Tone control or bandwidth control in amplifiers
  • H03G5/02—Manually-operated control
  • H03G5/04—Manually-operated control in untuned amplifiers
  • H03G5/06—Manually-operated control in untuned amplifiers having discharge tubes
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M9/00—Arrangements for interconnection not involving centralised switching
  • H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=19780914

Family Applications (1)

Country Status (4)

• 0
  • BE BE454425D patent/BE454425A/xx unknown
  • NL NL58180D patent/NL58180C/xx active
• 1944
  • 1944-02-17 FR FR904080D patent/FR904080A/fr not_active Expired
  • 1944-02-18 CH CH247563D patent/CH247563A/de unknown

Also Published As

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