3810550

Information

• Patent Grant
• 3810550

• References
• Source

• Patent Number

  3,810,550

• Date Filed

  Not available

• Date Issued

  Tuesday, May 14, 1974
  50 years ago

• CPC

  • B43M99/003 - with only one penholder

• US Classifications

  • 211 - Supports: racks