1979637

Information

• Patent Grant
• 1979637

• References
• Source

• Patent Number

  1,979,637

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1934
  90 years ago

• CPC

  • B24B7/165 - end faces of piston rings

• US Classifications

  • 451 - Abrading
  • 076 - Metal tools and implements, making