3510220

Information

• Patent Grant
• 3510220

• References
• Source

• Patent Number

  3,510,220

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1970
  54 years ago

• CPC

  • G03B27/722 - when the reproduction scale is changed

• US Classifications

  • 355 - Photocopying
  • 353 - Optics: image projectors
  • 362 - Illumination