1521900

Information

• Patent Grant
• 1521900

• References
• Source

• Patent Number

  1,521,900

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1925
  100 years ago

• CPC

  • E03C1/282 - combined with additional object-catching devices
  • Y10T137/4598 - Topside access opening

• US Classifications

  • 137 - Fluid handling