441751

Information

• Patent Grant
• 441751

• References
• Source

• Patent Number

  441,751

• Date Filed

  Not available

• Date Issued

  Tuesday, December 2, 1890
  134 years ago

• CPC

  • E03C1/295 - using air-supply valves
  • Y10T137/3258 - Automatic valve in vent line
  • Y10T137/4486 - Plural valves or valve seats
  • Y10T137/7838 - Plural
  • Y10T137/7902 - Valve mounted on end of pipe

• US Classifications

  • 137 - Fluid handling