3855574

Information

• Patent Grant
• 3855574

• References
• Source

• Patent Number

  3,855,574

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1974
  50 years ago

• CPC

  • H03K17/94 - characterised by the way in which the control signal is generated
  • G04B23/03 - Alarm signal stop arrangements
  • G04G13/023 - Adjusting the duration or amplitude of signals
  • Y10T307/766 - Condition responsive

• US Classifications

  • 340 - Communications: electrical
  • 307 - Electrical transmission or interconnection systems
  • 367 - Communications, electrical: acoustic wave systems and devices
  • 368 - Horology: time measuring systems or devices
  • 968 - Horology