| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 15 |
| Publication | Filing date | Title |
|---|---|---|
| FR2574846A1 | Internal window shutter, whose position is adjustable, and process for closing a window | |
| FR2493485A1 | Solar heat recovery device for facade of various buildings | |
| FR2348449A1 | Storage type solar radiation energy collector - has honeycomb structure underneath transparent cover with water circulating into absorbing heat storage core | |
| FR2237487A5 | Ventilation shutter control mechanism - is operated by system of linked levers and screw threaded handle |