2542142

Information

• Patent Grant
• 2542142

• References
• Source

• Patent Number

  2,542,142

• Date Filed

  Not available

• Date Issued

  Tuesday, February 20, 1951
  73 years ago

• CPC

  • B44B3/001 - by copying
  • B44B2700/021 - by copying

• US Classifications

  • 033 - Geometrical instruments