3509980

Information

• Patent Grant
• 3509980

• References
• Source

• Patent Number

  3,509,980

• Date Filed

  Not available

• Date Issued

  Tuesday, May 5, 1970
  54 years ago

• CPC

  • B41J2/32 - using thermal heads
  • B41J29/18 - Mechanisms for rendering the print visible to the operator

• US Classifications

  • 400 - Typewriting machines
  • 347 - Incremental printing of symbolic information