Number | Name | Date | Kind |
---|---|---|---|
4434010 | Ash | Feb 1984 | |
4510225 | Kuehnle | Apr 1985 | |
4547002 | Colgate, Jr. | Oct 1985 | |
4597593 | Maurer | Jul 1986 | |
4672891 | Maurer et al. | Jun 1987 | |
5045426 | Maierson | Sep 1991 |
Number | Date | Country |
---|---|---|
944987 | Sep 1974 | CAX |
1253367 | May 1989 | CAX |
2015070 | Dec 1990 | CAX |
3921636 | Jan 1991 | DEX |
3-130194 | Jun 1991 | JPX |
Entry |
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IBM Technical Disclosure Bulletin, "Secure Document Feature for Copy Machines"; Hobgood, Jr. G. W.; vol. 15 #2 Jul. 1972. |