1731571

Information

• Patent Grant
• 1731571

• References
• Source

• Patent Number

  1,731,571

• Date Filed

  Not available

• Date Issued

  Tuesday, October 15, 1929
  95 years ago

• CPC

  • E03D3/08 - with other retarding devices

• US Classifications

  • 251 - Valves and valve actuation