1817251

Information

• Patent Grant
• 1817251

• References
• Source

• Patent Number

  1,817,251

• Date Filed

  Not available

• Date Issued

  Tuesday, August 4, 1931
  93 years ago

• CPC

  • B41J13/054 - on the paper apron concentric with the roller platen

• US Classifications

  • 400 - Typewriting machines