Number | Date | Country | Kind |
---|---|---|---|
57-56455 | Apr 1982 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3552848 | Van Wagner | Jan 1971 | |
3809012 | Delvecchio | May 1974 | |
3917398 | Takahashi et al. | Nov 1975 | |
4140388 | Ikesue | Feb 1979 | |
4213617 | Salger | Jul 1980 |
Entry |
---|
Freeman et al., "Spring Loaded Seal", IBM Technical Disclosure Bulletin, vol. 17, No. 3, Aug., 1974. |