3450019

Information

• Patent Grant
• 3450019

• References
• Source

• Patent Number

  3,450,019

• Date Filed

  Not available

• Date Issued

  Tuesday, June 17, 1969
  55 years ago

• CPC

  • G08C19/38 - using dynamo-electric devices
  • G02B15/14 - by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective

• US Classifications

  • 318 - Electricity: motive power systems
  • 359 - Optical: systems and elements
  • 396 - Photography