1970658

Information

• Patent Grant
• 1970658

• References
• Source

• Patent Number

  1,970,658

• Date Filed

  Not available

• Date Issued

  Tuesday, August 21, 1934
  90 years ago

• CPC

  • B21K21/10 - cone-shaped or bell-shaped articles
  • Y10T29/49227 - Insulator making

• US Classifications

  • 029 - Metal working
  • 174 - Electricity: conductors and insulators