1455657

Information

• Patent Grant
• 1455657

• References
• Source

• Patent Number

  1,455,657

• Date Filed

  Not available

• Date Issued

  Tuesday, May 15, 1923
  101 years ago

• CPC

  • E04D13/17 - Ventilation of roof coverings not otherwise provided for
  • E04B5/04 - with beams or slabs of concrete or other stone-like material
  • E04D3/04 - of concrete or ceramics

• US Classifications

  • 138 - Pipes and tubular conduits
  • 052 - Static structures