3690640

Information

• Patent Grant
• 3690640

• References
• Source

• Patent Number

  3,690,640

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1972
  52 years ago

• CPC

  • F16F1/424 - of membrane-type springs
  • F16F2236/022 - of membrane-type springs

• US Classifications

  • 267 - Spring devices