Number | Date | Country | Kind |
---|---|---|---|
2933616 | Aug 1979 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2204187 | Ostler | Jun 1940 | |
3755700 | Buschmann et al. | Aug 1973 | |
3804009 | Blume | Apr 1974 | |
4018154 | Matsumoto et al. | Apr 1977 | |
4062285 | Deetz et al. | Dec 1977 |
Number | Date | Country |
---|---|---|
1761651 | Jul 1971 | DEX |
2238605 | Feb 1974 | DEX |
674812 | Jul 1952 | GBX |
Entry |
---|
Mathews, IBM Tech. Discl. Bulletin, vol. 19, No. 9, Feb. 1977, pp. 3245-3246. |