2961772

Information

• Patent Grant
• 2961772

• References
• Source

• Patent Number

  2,961,772

• Date Filed

  Not available

• Date Issued

  Tuesday, November 29, 1960
  64 years ago

• CPC

  • G09B29/12 - Relief maps
  • B43L13/001 - Mathematical drawing instruments

• US Classifications

  • 033 - Geometrical instruments