1838823

Information

• Patent Grant
• 1838823

• References
• Source

• Patent Number

  1,838,823

• Date Filed

  Not available

• Date Issued

  Tuesday, December 29, 1931
  93 years ago

• CPC

  • E04H6/40 - characterised by use of turntables or rotary rings

• US Classifications

  • 104 - Railways