1757020

Information

• Patent Grant
• 1757020

• References
• Source

• Patent Number

  1,757,020

• Date Filed

  Not available

• Date Issued

  Tuesday, May 6, 1930
  94 years ago

• CPC

  • E05B39/04 - with counting or registering devices
  • Y10T70/476 - Free end only engaged
  • Y10T70/7729 - Permutation
  • Y10T70/7746 - Removable change element
  • Y10T70/8162 - Padlock

• US Classifications

  • 070 - Locks