1533747

Information

• Patent Grant
• 1533747

• References
• Source

• Patent Number

  1,533,747

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1925
  99 years ago

• CPC

  • E03B3/20 - of elements of special shape

• US Classifications

  • 166 - Wells
  • 175 - Boring or penetrating the earth