1552487

Information

• Patent Grant
• 1552487

• References
• Source

• Patent Number

  1,552,487

• Date Filed

  Not available

• Date Issued

  Tuesday, September 8, 1925
  99 years ago

• CPC

  • E21F5/04 - Spraying barriers
  • G01C9/12 - by using a single pendulum

• US Classifications

  • 033 - Geometrical instruments