Number | Name | Date | Kind |
---|---|---|---|
2997295 | Beck | Aug 1961 | |
3097578 | Winkler et al. | Jul 1963 | |
3265382 | Sherman | Aug 1966 | |
5242369 | Eschweiler, Jr. et al. | Sep 1993 | |
5246415 | Fuss | Sep 1993 |
Number | Date | Country |
---|---|---|
0447017 | Jan 1936 | GBX |
Entry |
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Xerox Disclosure Journal, Folder/Nester, Robert Hayskar, vol. 8 No. 2, Mar./Apr. 1983, pp. 99-100. |