1820676

Information

• Patent Grant
• 1820676

• References
• Source

• Patent Number

  1,820,676

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • B22C19/06 - Devices for rapping or loosening the pattern

• US Classifications

  • 366 - Agitating
  • 164 - Metal founding