1638536

Information

• Patent Grant
• 1638536

• References
• Source

• Patent Number

  1,638,536

• Date Filed

  Not available

• Date Issued

  Tuesday, August 9, 1927
  97 years ago

• CPC

  • H04B3/147 - fixed equalisers

• US Classifications

  • 333 - Wave transmission lines and networks
  • 178 - Telegraphy