1834729

Information

• Patent Grant
• 1834729

• References
• Source

• Patent Number

  1,834,729

• Date Filed

  Not available

• Date Issued

  Tuesday, December 1, 1931
  93 years ago

• CPC

  • E21C3/18 - directly by a piston of an internal-combustion engine

• US Classifications

  • 173 - Tool driving or impacting
  • 123 - Internal-combustion engines