3028144

Information

• Patent Grant
• 3028144

• References
• Source

• Patent Number

  3,028,144

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1962
  62 years ago

• CPC

  • E04G21/16 - Tools or apparatus
  • E02B17/0863 - with rack and pawl mechanism
  • E04B1/3511 - Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force
  • 052 - Static structures
  • 182 - Fire escape, ladder, or scaffold