Number | Date | Country | Kind |
---|---|---|---|
3018184 | May 1980 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3195173 | McNay et al. | Jul 1965 | |
4117569 | Lautenschlager, Jr. et al. | Oct 1978 |
Number | Date | Country |
---|---|---|
2016398 | Jan 1973 | DEX |
2122857 | Oct 1973 | DEX |
2337224 | Feb 1975 | DEX |
2401178 | Jul 1975 | DEX |
2634558 | Feb 1978 | DEX |
1801310 | Aug 1978 | DEX |