3809470

Information

• Patent Grant
• 3809470

• References
• Source

• Patent Number

  3,809,470

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • G03B23/044 - whereby the picture is returned to the same stock

• US Classifications

  • 353 - Optics: image projectors