3817397

Information

• Patent Grant
• 3817397

• References
• Source

• Patent Number

  3,817,397

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1974
  50 years ago

• CPC

  • B66C23/305 - with locking devices
  • B66C23/348 - the erection being operated by jacks

• US Classifications

  • 212 - Traversing hoists