3864939

Information

• Patent Grant
• 3864939

• References
• Source

• Patent Number

  3,864,939

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1975
  49 years ago

• CPC

  • A44C17/003 - Doublet stones
  • B44C5/06 - Natural ornaments imitations thereof
  • B44F9/04 - of stone surfaces
  • C03B37/15 - with heat application
  • G02B6/04 - formed by bundles of fibres
  • Y10S385/901 - Illuminating or display apparatus

• US Classifications

  • 063 - Jewelry
  • 385 - Optical waveguides
  • 501 - Compositions: ceramic