188637

Information

• Patent Grant
• 188637

• References
• Source

• Patent Number

  188,637

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1877
  147 years ago

• CPC

  • B25D9/005 - Devices for testing the tool's performance
  • G01N3/307 - generated by a compressed or tensile-stressed spring generated by pneumatic or hydraulic means

• US Classifications

  • 073 - Measuring and testing