1989457

Information

• Patent Grant
• 1989457

• References
• Source

• Patent Number

  1,989,457

• Date Filed

  Not available

• Date Issued

  Tuesday, January 29, 1935
  90 years ago

• CPC

  • E02B7/205 - Barrages controlled by the variations of the water level; automatically functioning barrages
  • E02B7/48 - Roof or double shutter gates

• US Classifications

  • 405 - Hydraulic and earth engineering