2220897

Information

• Patent Grant
• 2220897

• References
• Source

• Patent Number

  2,220,897

• Date Filed

  Not available

• Date Issued

  Tuesday, November 12, 1940
  84 years ago

• CPC

  • H02M1/24 - incorporating rolling or tumbling contacts
  • Y10T307/74 - Switching systems

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 310 - Electrical generator or motor structure
  • 363 - Electric power conversion systems