639551

Information

• Patent Grant
• 639551

• References
• Source

• Patent Number

  639,551

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1899
  125 years ago

• CPC

  • G01G7/045 - having a PID control system
  • A61B50/37 - for absorbent articles

• US Classifications

  • 177 - Weighing scales
  • 235 - Registers