1691029

Information

• Patent Grant
• 1691029

• References
• Source

• Patent Number

  1,691,029

• Date Filed

  Not available

• Date Issued

  Tuesday, November 13, 1928
  97 years ago

• CPC

  • H01B11/143 - using helically wound magnetic tape
  • Y10T428/12465 - having magnetic properties, or preformed fiber orientation coordinate with shape

• US Classifications

  • 178 - Telegraphy
  • 148 - Metal treatment
  • 428 - Stock material or miscellaneous articles