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| US4049505 | 12 avr. 1976 | 20 sept. 1977 | | Photoconductors for electrostatic imaging systems |
| US4277551 | 20 août 1979 | 7 juil. 1981 | Minnesota Mining and Manufacturing Company | Electrophotographic plate having charge transport overlayer |
| US4389389 | 2 août 1982 | 21 juin 1983 | Xerox Corporation | Process for preparation of high purity tellurium |
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| US4460408 | 5 août 1982 | 17 juil. 1984 | Xerox Corporation | Process for preparation of chalcogenide alloys by coreduction of esters |
| US4548800 | 2 août 1982 | 22 oct. 1985 | Xerox Corporation | Process for selenium purification |
| US5084301 | 4 sept. 1990 | 28 janv. 1992 | Xerox Corporation | Alloying and coating process |
