3686920

Information

• Patent Grant
• 3686920

• References
• Source

• Patent Number

  3,686,920

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1972
  52 years ago

• CPC

  • B21D11/08 - Bending by altering the thickness of part of the cross-section of the work
  • B21D5/00 - Bending sheet metal along straight lines
  • B21D11/20 - Bending sheet metal, not otherwise provided for
  • B21D11/206 - Curving corrugated sheets
  • B21D13/02 - by pressing
  • F17C3/027 - Wallpanels for so-called membrane tanks

• US Classifications

  • 072 - Metal deforming