Patents by Inventor Bernard Ahl

Bernard Ahl has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Apparatus for the construction of ceiling in multi-story concrete buildings
    Patent number: 4029286
    Abstract: This disclosure relates to a novel apparatus for constructing ceilings in multi-story concrete buildings by first forming the vertical walls of the building to a desired height, and thereafter forming the ceilings in sequence from top-to-bottom. The apparatus preferably includes a panel-like support within the peripheral walls of the building suspended from the building top by cables operated through power winches for raising and lowering the panel-like support incident to performing a building operation.
    Type: Grant
    Filed: April 16, 1973
    Date of Patent: June 14, 1977
    Inventor: Bernard Ahl