2180640

Information

• Patent Grant
• 2180640

• References
• Source

• Patent Number

  2,180,640

• Date Filed

  Not available

• Date Issued

  Tuesday, November 21, 1939
  85 years ago

• CPC

  • B24B19/006 - for grinding hollow glassware, bottles

• US Classifications

  • 451 - Abrading