| S.No. | Coverage | Scope | Language | Patent Nos. |
|---|---|---|---|---|
| 1. | 1974-86 | CANADA | English | 0,939,015-1,216,100 |
| 2. | 1974-93 | FRANCE | French | 2,184,361-2,692,901 |
| 3. | 1974-93 | GERMANY | German | 1,798,430-3,331,743 |
| 4. | 1974-93 | GREAT BRITAIN | English | 1,342,201-2,692,901 |
| 5. | 1967-73 | USA | English | 3,295,143-3,781,913 |