Issued Patents All Time
Showing 51–68 of 68 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE33172 | Process for magnetic image character recognition | Robert J. Gruber, Steven B. Bolte | 1990-02-27 |
| 4879199 | Process for preparing encapsulated color toner compositions | Robert J. Gruber, Raymond A. Yourd, III, Paul C. Julien, Steven B. Bolte | 1989-11-07 |
| 4837101 | Negatively charged colored toner compositions | Robert J. Gruber, Ronald J. Koch, Lawrence Floyd, Jr. | 1989-06-06 |
| 4737434 | Process for colored toners with selected triboelectric characteristics | Robert J. Gruber | 1988-04-12 |
| 4695524 | Process for ultra high quality images with magnetic developer composition | Robert J. Gruber, Lawrence Floyd, Jr., Steven B. Bolte, Michael G. Swales | 1987-09-22 |
| 4634649 | Developer compositions | Robert J. Gruber | 1987-01-06 |
| 4618243 | Apparatus for color development with a magnetic separator containing a stationary shell with rotating magnets | — | 1986-10-21 |
| 4609603 | Process for achieving consistent high quality images with magnetic developer composition | Robert J. Gruber, Lawrence Floyd, Jr., Steven B. Bolte | 1986-09-02 |
| 4578338 | Development process with toner composition containing low molecular weight waxes | Robert J. Gruber, Ronald J. Koch | 1986-03-25 |
| 4565765 | Process of developing electrostatic latent images comprised of rotating magnets contained in stationary shell and synthetic carrier | Leon A. Howland, Robert J. Gruber, Ronald J. Koch | 1986-01-21 |
| 4563086 | Copy quality monitoring for magnetic images | Robert J. Gruber, Steven B. Bolte | 1986-01-07 |
| 4556624 | Toner compositions with crosslinked resins and low molecular weight wax components | Robert J. Gruber, Ronald J. Koch, Steven B. Bolte | 1985-12-03 |
| 4520092 | Process for preventing deposition of toner particles in an imaging apparatus | Robert J. Gruber | 1985-05-28 |
| 4517268 | Process for magnetic image character recognition | Robert J. Gruber, Steven B. Bolte | 1985-05-14 |
| 4487825 | Conductive single component electrophotographic magnetic toner | Robert J. Gruber | 1984-12-11 |
| 4451837 | Conductive single component magnetic toner for use in electronic printing devices | Robert J. Gruber | 1984-05-29 |
| 4318974 | Copolycarbonate materials for flash fusing toners | Thomas J. Pacansky, Robert J. Gruber | 1982-03-09 |
| 4296192 | Electrostatographic toner composition | Robert J. Gruber, Steven B. Bolte, Dale R. Ims, Richard B. Lewis | 1981-10-20 |