2158820

Information

• Patent Grant
• 2158820

• References
• Source

• Patent Number

  2,158,820

• Date Filed

  Not available

• Date Issued

  Tuesday, May 16, 1939
  85 years ago

• CPC

  • H03G11/08 - Limiting rate of change of amplitude

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 455 - Telecommunications