3584151

Information

• Patent Grant
• 3584151

• References
• Source

• Patent Number

  3,584,151

• Date Filed

  Not available

• Date Issued

  Tuesday, June 8, 1971
  53 years ago

• CPC

  • H04M11/027 - Annunciator systems for hospitals

• US Classifications

  • 340 - Communications: electrical
  • 379 - Telephonic communications