3654711

Information

• Patent Grant
• 3654711

• References
• Source

• Patent Number

  3,654,711

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1972
  52 years ago

• CPC

  • B43L1/045 - with magnetic action
  • B43L1/06 - rigid
  • B43L1/10 - Writing surfaces thereof
  • Y10S428/90 - Magnetic feature

• US Classifications

  • 434 - Education and demonstration
  • 428 - Stock material or miscellaneous articles