2991574

Information

• Patent Grant
• 2991574

• References
• Source

• Patent Number

  2,991,574

• Date Filed

  Not available

• Date Issued

  Tuesday, July 11, 1961
  63 years ago

• CPC

  • G09F19/12 - using special optical effects
  • A47G19/2227 - with means for amusing or giving information to the user
  • A63H33/3022 - simulating liquid flow
  • G09F13/24 - using tubes or the like filled with liquid
  • A47G2023/0658 - illuminated

• US Classifications

  • 040 - Card, picture, or sign exhibiting