3921181

Information

• Patent Grant
• 3921181

• References
• Source

• Patent Number

  3,921,181

• Date Filed

  Not available

• Date Issued

  Tuesday, November 18, 1975
  48 years ago

• CPC

  • H04N1/16 - using a rotating helical element

• US Classifications

  • 347 - Incremental printing of symbolic information
  • 346 - Recorders