1979896

Information

• Patent Grant
• 1979896

• References
• Source

• Patent Number

  1,979,896

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1934
  90 years ago

• CPC

  • E21D5/12 - Accessories for making shaft linings
  • E21D11/04 - Lining with building materials

• US Classifications

  • 405 - Hydraulic and earth engineering