3512272

Information

• Patent Grant
• 3512272

• References
• Source

• Patent Number

  3,512,272

• Date Filed

  Not available

• Date Issued

  Tuesday, May 19, 1970
  54 years ago

• CPC

  • G03B9/14 - Two separate members moving in opposite directions
  • G09B17/04 - for increasing the rate of reading Reading rate control
  • Y10S353/02 - Film strip

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • 353 - Optics: image projectors