3659928

Information

• Patent Grant
• 3659928

• References
• Source

• Patent Number

  3,659,928

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1972
  52 years ago

• CPC

  • A47F7/02 - for jewellery, dentures, watches, eye-glasses, lenses, or the like
  • G09F19/10 - Devices demonstrating the action of an article to be advertised
  • G09F19/18 - involving the use of optical projection means

• US Classifications

  • 359 - Optical: systems and elements
  • 434 - Education and demonstration