2397668

Information

• Patent Grant
• 2397668

• References
• Source

• Patent Number

  2,397,668

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1946
  78 years ago

• CPC

  • G03B27/38 - embodying screws with non-uniform pitch

• US Classifications

  • 355 - Photocopying