3821537

Information

• Patent Grant
• 3821537

• References
• Source

• Patent Number

  3,821,537

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • B67D7/228 - using digital counting
  • G06D1/00 - Details
  • G06Q50/06 - Electricity, gas or water supply
  • Y10T137/2065 - Responsive to condition external of system
  • Y10T137/2153 - With feedback passage[s] between devices of cascade
  • Y10T137/2158 - With pulsed control-input signal

• US Classifications

  • 235 - Registers
  • 137 - Fluid handling
  • 705 - Data processing: financial, business practice, management, or cost/price determination