2267649

Information

• Patent Grant
• 2267649

• References
• Source

• Patent Number

  2,267,649

• Date Filed

  Not available

• Date Issued

  Tuesday, December 23, 1941
  83 years ago

• CPC

  • G09B29/104 - involving the optical projection of slides, microfilm or the like

• US Classifications

  • 353 - Optics: image projectors
  • 033 - Geometrical instruments
  • 073 - Measuring and testing