Number | Name | Date | Kind |
---|---|---|---|
4632763 | Wernicke et al. | Dec 1986 | |
4637865 | Sergent et al. | Jan 1987 | |
5133846 | De Niel et al. | Jul 1992 |
Number | Date | Country |
---|---|---|
1092-743-A | Oct 1987 | JPX |
Entry |
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"Photo Wash Water Recycling System Utilizes Ion Exchange Technology", Robert T. Kreiman, 1984. |