1393578

Information

• Patent Grant
• 1393578

• References
• Source

• Patent Number

  1,393,578

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1921
  103 years ago

• CPC

  • E02B9/022 - Closures
  • A01B3/38 - without alternating possibility
  • Y02E10/22 - Conventional

• US Classifications

  • 251 - Valves and valve actuation
  • 405 - Hydraulic and earth engineering