2093636

Information

• Patent Grant
• 2093636

• References
• Source

• Patent Number

  2,093,636

• Date Filed

  Not available

• Date Issued

  Tuesday, September 21, 1937
  87 years ago

• CPC

  • G09B11/08 - Teaching shorthand

• US Classifications

  • 235 - Registers
  • 033 - Geometrical instruments