| Patents for E04C 2 - Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels (28,204) | |
|---|---|
| 01/1976 | |
| 01/13/1976 | US3932248 Method and apparatus for making laminated board with a pocketed core |
| 01/06/1976 | US3930929 Apparatus to construct wall panels having openings for doors and windows |
| 01/06/1976 | US3930347 Structural unit body having a pipe incorporated therein |
| 05/1975 | |
| 05/25/1975 | US3959050 Plaque board with polyurethane core and method for construction same |