2975630

Information

• Patent Grant
• 2975630

• References
• Source

• Patent Number

  2,975,630

• Date Filed

  Not available

• Date Issued

  Tuesday, March 21, 1961
  63 years ago

• CPC

  • G01N3/40 - Investigating hardness or rebound hardness
  • G01N3/14 - generated by dead weight
  • G01N2203/0041 - Human or animal power

• US Classifications

  • 073 - Measuring and testing
  • 033 - Geometrical instruments