2502440

Information

• Patent Grant
• 2502440

• References
• Source

• Patent Number

  2,502,440

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1950
  74 years ago

• CPC

  • H04M1/515 - by generating or selecting other signals than trains of pulses of similar shape or other signals than currents of one or more different frequencies
  • H04M1/23 - Construction or mounting of dials or of equivalent devices Means for facilitating the use thereof
  • H04Q1/34 - Impulse regenerators with mechanical or other non-electrical marking arrangements
  • H04Q3/42 - Circuit arrangements for indirect selecting controlled by common circuits
  • Y10T74/20444 - including rolling antifriction elements

• US Classifications

  • 341 - Coded data generation or conversion
  • 074 - Machine element or mechanism
  • 379 - Telephonic communications