2270675

Information

• Patent Grant
• 2270675

• References
• Source

• Patent Number

  2,270,675

• Date Filed

  Not available

• Date Issued

  Tuesday, January 20, 1942
  82 years ago

• CPC

  • H04Q3/625 - Arrangements in the private branch exchange
  • C08K5/01 - Hydrocarbons
  • C09B33/18 - Trisazo or higher polyazo dyes

• US Classifications

  • 534 - Organic compounds