3811857

Information

• Patent Grant
• 3811857

• References
• Source

• Patent Number

  3,811,857

• Date Filed

  Not available

• Date Issued

  Tuesday, May 21, 1974
  50 years ago

• CPC

  • C03B29/04 - in a continuous way
  • C03B29/02 - in a discontinuous way

• US Classifications

  • 065 - Glass manufacturing
  • 313 - Electric lamp and discharge devices
  • 351 - Optics: eye examining, vision testing and correcting