3869900

Information

• Patent Grant
• 3869900

• References
• Source

• Patent Number

  3,869,900

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1975
  49 years ago

• CPC

  • B21F35/04 - Making flat springs
  • B21F1/04 - Undulating

• US Classifications

  • 072 - Metal deforming
  • 140 - Wireworking