3674729

Information

• Patent Grant
• 3674729

• References
• Source

• Patent Number

  3,674,729

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1972
  52 years ago

• CPC

  • G03F1/72 - Repair or correction of mask defects
  • G03C11/04 - Retouching

• US Classifications

  • 524 - Synthetic resins or natural rubbers