1811800

Information

• Patent Grant
• 1811800

• References
• Source

• Patent Number

  1,811,800

• Date Filed

  Not available

• Date Issued

  Tuesday, June 23, 1931
  93 years ago

• CPC

  • F22B37/426 - Feed-water supply alarm devices using electric signals

• US Classifications

  • 340 - Communications: electrical