Patents by Inventor H. James Heidt

H. James Heidt 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).

  • Combined drainage and waterproofing panel system for subterranean walls
    Patent number: 4943185
    Abstract: A combination drainage and waterproofing system for subterranean walls includes panels which have drain passages on the side thereof adjacent the soil. The front surface of each panel screens against soil entering the passages and the opposite surface of each panel is waterproof and is disposed in waterproof engagement with the waterproof surfaces of adjacent panels. A variety of panel constructions are disclosed. Several modes for providing the screening surfaces and the waterproof surfaces are also disclosed.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: July 24, 1990
    Inventors: James P. McGuckin, Dean L. Bradfield, Raymond A. Foltz, H. James Heidt