3892025

Information

• Patent Grant
• 3892025

• References
• Source

• Patent Number

  3,892,025

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1975
  49 years ago

• CPC

  • H04R23/006 - using solid state devices
  • Y10T29/49002 - Electrical device making
  • Y10T29/49577 - Phonograph component making

• US Classifications

  • 029 - Metal working
  • 219 - Electric heating
  • 228 - Metal fusion bonding
  • 369 - Dynamic information storage or retrieval
  • 438 - Semiconductor device manufacturing: process