1912546

Information

• Patent Grant
• 1912546

• References
• Source

• Patent Number

  1,912,546

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1933
  91 years ago

• CPC

  • E01C23/05 - Devices for installing or removing forms

• US Classifications

  • 033 - Geometrical instruments