3838417

Information

• Patent Grant
• 3838417

• References
• Source

• Patent Number

  3,838,417

• Date Filed

  Not available

• Date Issued

  Tuesday, September 24, 1974
  50 years ago

• CPC

  • A63J5/10 - Arrangements for making visible or audible the words spoken
  • A63J17/00 - Apparatus for performing colour-music

• US Classifications

  • 340 - Communications: electrical