3577004

Information

• Patent Grant
• 3577004

• References
• Source

• Patent Number

  3,577,004

• Date Filed

  Not available

• Date Issued

  Tuesday, May 4, 1971
  53 years ago

• CPC

  • G04C21/28 - by closing a contact to put into action electro-acoustic means
  • G04C23/34 - with provision for automatic modification of the programme
  • Y10T307/484 - Sequential or alternating
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 968 - Horology