1804705

Information

• Patent Grant
• 1804705

• References
• Source

• Patent Number

  1,804,705

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1931
  93 years ago

• CPC

  • B21F3/06 - internally on a hollow form
  • B21F3/04 - externally on a mandrel or the like
  • B21F45/06 - of flexible shafts or hollow conduits
  • Y10S264/40 - Processes of coiling plastics
  • Y10T29/49609 - Spring making

• US Classifications

  • 072 - Metal deforming
  • 029 - Metal working
  • 264 - Plastic and nonmetallic article shaping or treating: processes