2673900

Information

• Patent Grant
• 2673900

• References
• Source

• Patent Number

  2,673,900

• Date Filed

  Not available

• Date Issued

  Tuesday, March 30, 1954
  70 years ago

• CPC

  • B23F5/06 - the tool being a grinding disc with a plane front surface
  • H01J23/42 - the interaction circuit being a helix or a helix-derived slow-wave structure
  • H01J23/52 - the coupled helices being disposed coaxially around one another

• US Classifications

  • 330 - Amplifiers
  • 313 - Electric lamp and discharge devices
  • 315 - Electric lamp and discharge devices: systems
  • 333 - Wave transmission lines and networks