2428072

Information

• Patent Grant
• 2428072

• References
• Source

• Patent Number

  2,428,072

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1947
  77 years ago

• CPC

  • H01H63/22 - using step-by-step electromagnetic drive without ratchet
  • H04M9/002 - with subscriber controlled access to a line

• US Classifications

  • 379 - Telephonic communications