Issued Patents All Time
Showing 226–237 of 237 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6049683 | Electrostatic printing method and apparatus having enhanced custom color characteristics | Weizhong Zhao | 2000-04-11 |
| 6020099 | Method and apparatus for forming and refining toner images in an electrostatic printing machine | Weizhong Zhao | 2000-02-01 |
| 6009294 | Addressable toner applicator and method and apparatus for enhancing custom color characteristics in a contact electrostatic printing apparatus | Weizhong Zhao | 1999-12-28 |
| 6006061 | Method and apparatus for forming high quality images in an electrostatic printing machine | Weizhong Zhao | 1999-12-21 |
| 5991577 | Air breakdown charge and development image forming method and apparatus using image area centered patches of toner | Weizhong Zhao | 1999-11-23 |
| 5991582 | Method and apparatus for developing high quality images in a liquid immersion development machine | Weizhong Zhao | 1999-11-23 |
| 5991578 | Image forming reverse charge printing method and apparatus using image area centered patches of toner | Weizhong Zhao | 1999-11-23 |
| 5987283 | Apparatus and method for developing an electrostatic latent image directly from an imaging member to a final substrate | Weizhong Zhao | 1999-11-16 |
| 5937243 | Image-wise toner layer charging via air breakdown for image development | Weizhong Zhao | 1999-08-10 |
| 5937248 | Contact electrostatic printing image forming method and apparatus using image area centered patch of tonerpatches of toner | Weizhong Zhao | 1999-08-10 |
| 5848337 | Electrical biasing scheme for preventing overplating in an image-on-image electrostatographic printing system | David H. Pan, John F. Knapp, George A. Gibson, Robert M. Simms | 1998-12-08 |
| 5826147 | Electrostatic latent image development | Weizhong Zhao | 1998-10-20 |