1777788

Information

• Patent Grant
• 1777788

• References
• Source

• Patent Number

  1,777,788

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1930
  94 years ago

• CPC

  • B61H9/04 - for preventing or controlling movement in one direction or, selectively, in either direction

• US Classifications

  • 104 - Railways