3780315

Information

• Patent Grant
• 3780315

• References
• Source

• Patent Number

  3,780,315

• Date Filed

  Not available

• Date Issued

  Tuesday, December 18, 1973
  51 years ago

• CPC

  • A47L15/242 - in a closed loop
  • A47L15/4293 - Arrangements for programme selection
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 134 - Cleaning and liquid contact with solids
  • 340 - Communications: electrical