2280686

Information

• Patent Grant
• 2280686

• References
• Source

• Patent Number

  2,280,686

• Date Filed

  Not available

• Date Issued

  Tuesday, April 21, 1942
  82 years ago

• CPC

  • B21H7/182 - Rolling annular grooves
  • Y10S29/049 - Work hardening with other step
  • Y10T29/49298 - Poppet or I.C. engine valve or valve seat making

• US Classifications

  • 029 - Metal working
  • 072 - Metal deforming
  • 123 - Internal-combustion engines