Number | Name | Date | Kind |
---|---|---|---|
2380809 | Verkinderen et al. | Jul 1945 | |
2435173 | Bavley | Jan 1948 | |
2600788 | Loria et al. | Jun 1952 | |
2897079 | DeCat et al. | Jul 1959 | |
3502468 | Rogers | Mar 1970 |
Number | Date | Country |
---|---|---|
1247493 | Sep 1971 | GBX |
1252418 | Nov 1971 | GBX |
Entry |
---|
Research Disclosure, Dec. 1978, Item No. 17643, vol. 176, Kenneth Mason Publications Ltd., Hampshire England. |