2235633

Information

• Patent Grant
• 2235633

• References
• Source

• Patent Number

  2,235,633

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1941
  83 years ago

• CPC

  • E21B47/04 - Measuring depth or liquid level
  • G06M3/022 - by subtracting

• US Classifications

  • 235 - Registers