2501462

Information

• Patent Grant
• 2501462

• References
• Source

• Patent Number

  2,501,462

• Date Filed

  Not available

• Date Issued

  Tuesday, March 21, 1950
  74 years ago

• CPC

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

• US Classifications

  • 355 - Photocopying
  • 396 - Photography