Number | Date | Country | Kind |
---|---|---|---|
2454326 | Nov 1974 | DT |
Number | Name | Date | Kind |
---|---|---|---|
2754336 | Chernosky et al. | Jul 1956 | |
3501286 | Draber et al. | Mar 1970 | |
3631058 | Beck et al. | Dec 1971 | |
3697608 | Bellis | Oct 1972 |
Number | Date | Country |
---|---|---|
2,234,981 | Feb 1973 | DT |
709,887 | Jun 1954 | UK |
Entry |
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