3138864

Information

• Patent Grant
• 3138864

• References
• Source

• Patent Number

  3,138,864

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1964
  60 years ago

• CPC

  • B21D53/00 - Making other particular articles
  • B21D51/02 - characterised by the structure of the objects
  • Y10T29/49005 - Acoustic transducer

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working
  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets