1828236

Information

• Patent Grant
• 1828236

• References
• Source

• Patent Number

  1,828,236

• Date Filed

  Not available

• Date Issued

  Tuesday, October 20, 1931
  93 years ago

• CPC

  • G09F13/36 - co-operating with rotating screening means
  • Y10S40/902 - Circuit control

• US Classifications

  • 040 - Card, picture, or sign exhibiting
  • 315 - Electric lamp and discharge devices: systems