1989233

Information

• Patent Grant
• 1989233

• References
• Source

• Patent Number

  1,989,233

• Date Filed

  Not available

• Date Issued

  Tuesday, January 29, 1935
  90 years ago

• CPC

  • H02M3/40 - wherein the parts are rotating and collectors co-operate with brushes or rollers
  • Y10T307/872 - Repetitive make and break

• US Classifications

  • 363 - Electric power conversion systems
  • 307 - Electrical transmission or interconnection systems