1819921

Information

• Patent Grant
• 1819921

• References
• Source

• Patent Number

  1,819,921

• Date Filed

  Not available

• Date Issued

  Tuesday, August 18, 1931
  93 years ago

• CPC

  • G06G1/0078 - for calculating interests
  • G06G1/14 - in which a straight or curved line has to be drawn from given points on one or more input scales to one or more points on a result scale

• US Classifications

  • 235 - Registers