1979554

Information

• Patent Grant
• 1979554

• References
• Source

• Patent Number

  1,979,554

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1934
  90 years ago

• CPC

  • E01C23/0913 - with non-powered tools

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 015 - Brushing, scrubbing, and general cleaning
  • 030 - Cutlery