Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8004721 | Halftone apparatus that provides simultaneous, multiple lines per inch screens | Joan LaVerne Mitchell, Yue Qiao | 2011-08-23 |
| 7835034 | Halftone method and apparatus that provides a line screen frequency of N/2 for a printer resolution of N dots per inch without negative print effects | Joan LaVerne Mitchell, Timothy James Trenary, Yue Qiao | 2010-11-16 |
| 7170639 | Halftone method and apparatus that provides simultaneous, multiple lines per inch screens | Joan LaVerne Mitchell, Yue Qiao | 2007-01-30 |