3328884

Information

• Patent Grant
• 3328884

• References
• Source

• Patent Number

  3,328,884

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1967
  56 years ago

• CPC

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

• US Classifications

  • 033 - Geometrical instruments