Number | Date | Country | Kind |
---|---|---|---|
8715014 | Jun 1987 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3291480 | Haddad | Dec 1966 | |
3970299 | Berger, Jr. et al. | Jul 1976 | |
4073391 | O'Brien et al. | Feb 1978 | |
4147342 | Naramore | Apr 1979 | |
4295645 | Nahar et al. | Oct 1981 | |
4319743 | Rood | Mar 1982 | |
4475733 | Benson | Oct 1984 | |
4641949 | Wallace et al. | Feb 1987 | |
4648589 | Emrich et al. | Mar 1987 |
Number | Date | Country |
---|---|---|
0177251 | Oct 1984 | JPX |
414690 | Jun 1966 | CHX |
11722 | Jan 1914 | GBX |
542628 | Jan 1942 | GBX |
Entry |
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Xerox Disclosure Journa, vol. 6, No. 5, pp. 267, 268, Sep./Oct. 1981 |