930639

Information

• Patent Grant
• 930639

• References
• Source

• Patent Number

  930,639

• Date Filed

  Not available

• Date Issued

  Tuesday, August 10, 1909
  115 years ago

• CPC

  • B24B13/02 - by means of tools with abrading surfaces corresponding in shape with the lenses to be made
  • Y10S29/072 - Dip or splash supply

• US Classifications

  • 451 - Abrading
  • 029 - Metal working