2633372

Information

• Patent Grant
• 2633372

• References
• Source

• Patent Number

  2,633,372

• Date Filed

  Not available

• Date Issued

  Tuesday, March 31, 1953
  71 years ago

• CPC

  • B42D9/002 - permanently attached to the book

• US Classifications

  • 281 - Books, strips, and leaves
  • 116 - Signals and indicators