3831840

Information

• Patent Grant
• 3831840

• References
• Source

• Patent Number

  3,831,840

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1974
  50 years ago

• CPC

  • G06G1/0047 - for printing
  • G06G1/04 - characterised by construction

• US Classifications

  • 235 - Registers