1982187

Information

• Patent Grant
• 1982187

• References
• Source

• Patent Number

  1,982,187

• Date Filed

  Not available

• Date Issued

  Tuesday, November 27, 1934
  90 years ago

• CPC

  • G03B33/14 - using lenticular screens

• US Classifications

  • 355 - Photocopying
  • 359 - Optical: systems and elements