2185023

Information

• Patent Grant
• 2185023

• References
• Source

• Patent Number

  2,185,023

• Date Filed

  Not available

• Date Issued

  Tuesday, December 26, 1939
  85 years ago

• CPC

  • B66B13/02 - Door or gate operation

• US Classifications

  • 138 - Pipes and tubular conduits
  • 181 - Acoustics