Issued Patents All Time
Showing 76–91 of 91 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300992 | Mounting taut wires in gentle, self-spaced contact with a roll | Dan A. Hays | 1994-04-05 |
| 5289240 | Scavengeless developer unit with electroded donor roll | — | 1994-02-22 |
| 5253019 | Developer material transport | Grace T. Brewington | 1993-10-12 |
| 5245392 | Donor roll for scavengeless development in a xerographic apparatus | Thomas J. Behe, Jeffrey J. Folkins, Gerald T. Lioy, Grace T. Brewington, Joseph G. Schram | 1993-09-14 |
| 5172170 | Electroded donor roll for a scavengeless developer unit | Dan A. Hays, Michael A. Morgan, Paul J. Brach, Joseph Mammino | 1992-12-15 |
| 5128723 | Scavengeless development system having toner deposited on a doner roller from a toner mover | Steven B. Bolte, Grace T. Brewington, Dan A. Hays, Raymond W. Stover | 1992-07-07 |
| 5031570 | Printing apparatus and toner/developer delivery system therefor | Dan A. Hays | 1991-07-16 |
| 4972230 | Toner usage detector based on current biasing mixing means | — | 1990-11-20 |
| 4868600 | Scavengeless development apparatus for use in highlight color imaging | Dan A. Hays, Steven B. Bolte | 1989-09-19 |
| 4777904 | Touchdown development apparatus | Robert W. Gundlach, Richard F. Bergen, Frank T. Lippolis | 1988-10-18 |
| 4766457 | Particulate material dispenser | Laurence S. Barker, Dan A. Hays, Thomas P. Redding | 1988-08-23 |
| 4764841 | Toner charging apparatus with coated toner transport members | Grace T. Brewington, Dan A. Hays | 1988-08-16 |
| 4618241 | Apparatus, process for charging toner particles | Dan A. Hays | 1986-10-21 |
| 4545669 | Low voltage electrophotography with simultaneous photoreceptor charging, exposure and development | Dan A. Hays | 1985-10-08 |
| 4505573 | Toner charging apparatus containing wear resistant coatings | Grace T. Brewington, Steven B. Bolte, Dan A. Hays | 1985-03-19 |
| 4459009 | Apparatus, process for charging toner particles | Dan A. Hays | 1984-07-10 |