2159620

Information

• Patent Grant
• 2159620

• References
• Source

• Patent Number

  2,159,620

• Date Filed

  Not available

• Date Issued

  Tuesday, May 23, 1939
  85 years ago

• CPC

  • B24B13/02 - by means of tools with abrading surfaces corresponding in shape with the lenses to be made
  • Y10S451/901 - Super finish

• US Classifications

  • 451 - Abrading