Issued Patents All Time
Showing 51–74 of 74 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6610451 | Development systems for magnetic toners having reduced magnetic loadings | Thomas A. Jadwin, John F. Crichton, Robert D. Fields | 2003-08-26 |
| 6589703 | Electrographic methods using hard magnetic carrier particles | Robert D. Fields, Thomas A. Jadwin | 2003-07-08 |
| 6538677 | Apparatus and method for gray level printing | John R. Thompson, Yee S. Ng, Eric K. Zeise, Hwai-Tzuu Tai | 2003-03-25 |
| 6532350 | Method and system for increasing flash rate in a document reproduction system | Kenneth P. Friedrich, Joseph E. Guth, Wunan Chang | 2003-03-11 |
| 6526247 | Electrostatic image developing process with optimized setpoints | Joseph E. Guth, Matthias H. Regelsberger, Edward M. Eck | 2003-02-25 |
| 6480685 | System and method for quietly and efficiently cleaning and removing particles from a copier/printer machine | Kurt E. Jones, James D. Anthony | 2002-11-12 |
| 5985499 | Method and apparatus for forming two toner images in a single frame | Joseph E. Guth, W. Charles Kasiske, Jr., Yee S. Ng | 1999-11-16 |
| 5748218 | Method for forming toner images with two distinct toners | Joseph E. Guth, W. Charles Kasiske, Jr. | 1998-05-05 |
| 5659855 | Electrophotographic image member with magnetic property and image forming apparatus | Joseph A. Pavlisko | 1997-08-19 |
| 5606404 | Toner development station with non-conductive skive | Thomas K. Hilbert | 1997-02-25 |
| 5506372 | Development station having a particle removing device | Joseph E. Guth | 1996-04-09 |
| 5489975 | Image forming method and apparatus | Joseph Y. Kaukeinen, Thomas A. Jadwin, Peter S. Alexandrovich | 1996-02-06 |
| 5426487 | Image forming apparatus having bimodal charging means | Joseph E. Guth | 1995-06-20 |
| 5409791 | Image forming method and apparatus | Joseph Y. Kaukeinen, Thomas A. Jadwin, Peter S. Alexandrovich | 1995-04-25 |
| 5394230 | Method and apparatus for forming a composite dry toner image | Joseph Y. Kaukeinen, Joseph E. Guth | 1995-02-28 |
| 5376492 | Method and apparatus for developing an electrostatic image using a two component developer | Peter S. Alexandrovich, Joseph E. Guth | 1994-12-27 |
| 5307124 | Development method and apparatus including toner pre-charging capability | — | 1994-04-26 |
| 5255057 | Gray scale monocomponent nonmagnetic development system | Joseph E. Guth, William B. Vreeland, Thomas A. Jadwin | 1993-10-19 |
| 5183964 | Toner charge control | Joseph E. Guth | 1993-02-02 |
| 5124756 | Duplex apparatus having a roller fuser | — | 1992-06-23 |
| 5051780 | Fusing temperature control device for a printer or similar apparatus | Allan R. Amering, Michael Beyerlein | 1991-09-24 |
| 5036362 | Sequential development with magnetic and non-magnetic toner | — | 1991-07-30 |
| 4980719 | Copier/printer and method for reproduction of secure documents or the like | James D. Allen, IV, David M. McVay, Eugene Yeo | 1990-12-25 |
| 4980727 | Toner concentration control system | — | 1990-12-25 |