1989887

Information

• Patent Grant
• 1989887

• References
• Source

• Patent Number

  1,989,887

• Date Filed

  Not available

• Date Issued

  Tuesday, February 5, 1935
  90 years ago

• CPC

  • H05K1/0306 - Inorganic insulating substrates
  • G06K1/025 - Details

• US Classifications

  • 234 - Selective cutting