| 2305247 | Wallboard joint and method of joining wallboards | |||
| 2276071 | Panel construction | |||
| 2107240 | Construction unit | |||
| 2068098 | Fastening panels that shrink | |||
| 1942946 | Composition board | |||
| 1582721 | Precast plaster-wall section | |||
| 1534142 | Keyed insulating board |
| FR1123293A |