 
                 Patent Grant
 Patent Grant
                     5425208
 5425208
                    | Number | Date | Country | Kind | 
|---|---|---|---|
| 4-293296 | Oct 1992 | JPX | |
| 5-071688 | Mar 1993 | JPX | 
| Number | Name | Date | Kind | 
|---|---|---|---|
| 3685240 | Oscari | Aug 1972 | |
| 4562680 | Sukolics | Jan 1986 | |
| 4843791 | Michlovic | Jul 1989 | |
| 4854095 | Michlovic | Aug 1989 | 
| Number | Date | Country | 
|---|---|---|
| 0201212 | Nov 1986 | EPX | 
| 2134167 | Jan 1973 | DDX | 
| 64-10845 | Jan 1989 | JPX | 
| 1-122110 | Aug 1989 | JPX | 
| 8802764 | Jun 1990 | NLX | 
| Entry | 
|---|
| M. A. Opici, "Vetrate Sospese", Nuova Finestra, vol. 13,No. 6, Jun. 1992, Milano, IT, pp. 177-187. |