2425743

Information

• Patent Grant
• 2425743

• References
• Source

• Patent Number

  2,425,743

• Date Filed

  Not available

• Date Issued

  Tuesday, August 19, 1947
  77 years ago

• CPC

  • H04M19/00 - Current supply arrangements for telephone systems
  • H02J7/1492 - by means of controlling devices between the generator output and the battery
  • H02J7/241 - using discharge tubes only

• US Classifications

  • 322 - Electricity: single generator systems
  • 361 - Electricity: electrical systems and devices