3677643

Information

• Patent Grant
• 3677643

• References
• Source

• Patent Number

  3,677,643

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • G03B27/20 - by using a vacuum or fluid pressure
  • G03B27/14 - Details

• US Classifications

  • 355 - Photocopying