1835771

Information

• Patent Grant
• 1835771

• References
• Source

• Patent Number

  1,835,771

• Date Filed

  Not available

• Date Issued

  Tuesday, December 8, 1931
  93 years ago

• CPC

  • H01B11/143 - using helically wound magnetic tape

• US Classifications

  • 178 - Telegraphy
  • 057 - Textiles: spinning, twisting, and twining