Patents by Inventor Conrad Roland Lehmann

Conrad Roland Lehmann 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).

  • Patent number: 3970301
    Abstract: A spatial network, in particular a climbing device for children. The climbing device is composed of a three-dimensional inner net of tensile members and a three-dimensional outer net which serves to hold the inner net. The three-dimensional outer net consists of tensile members forming polyhedral and polygonal curved edges and doubly-curved faces. The polyhedra have a maximum of eight verticies and have their faces, in operation, at an angle to the vertical. The three-dimensional inner net consists wholly or partly of at least one continuous ring, in particular a rope ring. The ring forms several interlinked polygonal meshes such as polygonal faces defined by its edges which consist of the tensile members.
    Type: Grant
    Filed: August 15, 1974
    Date of Patent: July 20, 1976
    Inventor: Conrad Roland Lehmann