2733528

Information

• Patent Grant
• 2733528

• References
• Source

• Patent Number

  2,733,528

• Date Filed

  Not available

• Date Issued

  Tuesday, February 7, 1956
  69 years ago

• CPC

  • G04B47/00 - Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
  • A61M21/00 - Other devices or methods to cause a change in the state of consciousness Devices for producing or ending sleep by mechanical, optical, or acoustical means
  • A63J5/10 - Arrangements for making visible or audible the words spoken
  • G02B27/06 - with moving picture effect
  • A61M2021/0044 - by the sight sense

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 472 - Amusement devices
  • 968 - Horology
  • D10 - Measuring, testing, or signalling instruments