1336921

Information

• Patent Grant
• 1336921

• References
• Source

• Patent Number

  1,336,921

• Date Filed

  Not available

• Date Issued

  Tuesday, April 13, 1920
  104 years ago

• CPC

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

• US Classifications

  • 091 - Motors: expansible chamber type
  • 366 - Agitating