2290809

Information

• Patent Grant
• 2290809

• References
• Source

• Patent Number

  2,290,809

• Date Filed

  Not available

• Date Issued

  Tuesday, July 21, 1942
  82 years ago

• CPC

  • E21F5/10 - Devices for rock dusting

• US Classifications

  • 406 - Conveyors: fluid current