3688386

Information

• Patent Grant
• 3688386

• References
• Source

• Patent Number

  3,688,386

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • B24B13/0025 - for contact lenses
  • B26F1/16 - Perforating by tool or tools of the drill type
  • B28D1/143 - lens-drilling machines
  • Y10S408/704 - Drilling small holes
  • Y10T29/49996 - Successive distinct removal operations
  • Y10T408/03 - Processes

• US Classifications

  • 029 - Metal working
  • 033 - Geometrical instruments
  • 264 - Plastic and nonmetallic article shaping or treating: processes
  • 351 - Optics: eye examining, vision testing and correcting
  • 408 - Cutting by use of rotating axially moving tool