2274737

Information

• Patent Grant
• 2274737

• References
• Source

• Patent Number

  2,274,737

• Date Filed

  Not available

• Date Issued

  Tuesday, March 3, 1942
  82 years ago

• CPC

  • H04L17/14 - with optical sensing means
  • H04L13/06 - Tape or page guiding or feeding devices
  • A61M1/02 - Blood transfusion apparatus

• US Classifications

  • 178 - Telegraphy
  • 250 - Radiant energy