2620687

Information

• Patent Grant
• 2620687

• References
• Source

• Patent Number

  2,620,687

• Date Filed

  Not available

• Date Issued

  Tuesday, December 9, 1952
  72 years ago

• CPC

  • B28D1/143 - lens-drilling machines
  • Y10T408/3792 - with means to sequentially feed tools toward work

• US Classifications

  • 408 - Cutting by use of rotating axially moving tool