Number | Date | Country | Kind |
---|---|---|---|
8318474 | Jul 1983 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
736140 | Nicholl | Aug 1903 | |
3224112 | Hanson | Dec 1965 |
Number | Date | Country |
---|---|---|
530555 | Dec 1940 | GBX |
1252752 | Nov 1971 | GBX |
1287675 | Sep 1972 | GBX |
1409248 | Oct 1975 | GBX |
Entry |
---|
Xerox Disclosure Journal, vol. 1, No. 3, p. 1, Mar. 1976, 434-346. |