2252577

Information

• Patent Grant
• 2252577

• References
• Source

• Patent Number

  2,252,577

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1941
  83 years ago

• CPC

  • F16K5/207 - using bellows
  • G03B21/134 - Projectors combined with typing apparatus or with printing apparatus
  • H04L13/188 - Projection of the printed matter

• US Classifications

  • 178 - Telegraphy
  • 101 - Printing
  • 353 - Optics: image projectors