1336984

Information

• Patent Grant
• 1336984

• References
• Source

• Patent Number

  1,336,984

• Date Filed

  Not available

• Date Issued

  Tuesday, April 13, 1920
  104 years ago

• CPC

  • F04B39/068 - prevention of freezing

• US Classifications

  • 138 - Pipes and tubular conduits
  • 184 - Lubrication
  • 261 - Gas and liquid contact apparatus