1639682

Information

• Patent Grant
• 1639682

• References
• Source

• Patent Number

  1,639,682

• Date Filed

  Not available

• Date Issued

  Tuesday, August 23, 1927
  97 years ago

• CPC

  • F21H3/00 - Manufacturing incandescent mantles Treatment prior to use

• US Classifications

  • 431 - Combustion