3496438

Information

• Patent Grant
• 3496438

• References
• Source

• Patent Number

  3,496,438

• Date Filed

  Not available

• Date Issued

  Tuesday, February 17, 1970
  55 years ago

• CPC

  • G04C21/28 - by closing a contact to put into action electro-acoustic means

• US Classifications

  • 318 - Electricity: motive power systems
  • 340 - Communications: electrical
  • 968 - Horology