Number | Date | Country | Kind |
---|---|---|---|
2817478 | Apr 1978 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3094262 | Ashby et al. | Jun 1963 | |
3423000 | Heinen | Jan 1969 | |
3802036 | Parks | Apr 1974 | |
3837052 | Martin et al. | Sep 1974 | |
3970231 | Strutz et al. | Jul 1976 | |
3986325 | Ritter et al. | Oct 1976 | |
4051581 | Biot et al. | Oct 1977 | |
4073421 | Reufer | Feb 1978 |
Number | Date | Country |
---|---|---|
2708102 | Aug 1978 | DEX |
Entry |
---|
PCT No,. WO 79/00956, published 11/15/79, Gujer et al., 9 pp. spec.; 2 shts. dwg. |