3820646

Information

• Patent Grant
• 3820646

• References
• Source

• Patent Number

  3,820,646

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • B41J19/84 - in the form of a roller rotated for line spacing

• US Classifications

  • 400 - Typewriting machines