2975537

Information

• Patent Grant
• 2975537

• References
• Source

• Patent Number

  2,975,537

• Date Filed

  Not available

• Date Issued

  Tuesday, March 21, 1961
  63 years ago

• CPC

  • B42F21/10 - represented by slits

• US Classifications

  • 040 - Card, picture, or sign exhibiting