Number | Date | Country | Kind |
---|---|---|---|
3227733 | Jul 1982 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2812292 | Tucker | Nov 1957 | |
3933598 | Pries | Jan 1976 | |
4028193 | Nagayoshi | Jun 1977 | |
4115203 | Naevestad | Sep 1978 | |
4217177 | Gerding et al. | Aug 1980 | |
4387004 | Prins | Jun 1983 |
Number | Date | Country |
---|---|---|
940343 | Mar 1956 | DEX |
422182 | Oct 1933 | GBX |
Entry |
---|
Battelle Columbus Labs; "Development and Demonstration of Concepts for Improving Coke-Oven Door Seals", Aug. 1978. |