1402420

Information

• Patent Grant
• 1402420

• References
• Source

• Patent Number

  1,402,420

• Date Filed

  Not available

• Date Issued

  Tuesday, January 3, 1922
  103 years ago

• CPC

  • F42C13/06 - operated by sound waves
  • F42C14/045 - having electric igniters
  • Y10S200/20 - Sound and vibration operated

• US Classifications

  • 200 - Electricity: circuit makers and breakers
  • 367 - Communications, electrical: acoustic wave systems and devices