Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11848166 | Keyboard with adjustable feedback | John A. Porcella, Thomas R. Matzinger | 2023-12-19 |
| 11094483 | Keyboard with adjustable feedback | John A. Poncella, Thomas R. Matzinger | 2021-08-17 |
| 11083497 | Adjustment instrument with tactile feedback | Subash K. Mannanal | 2021-08-10 |
| 10368913 | Adjustment instrument with tactile feedback | Subash K. Mannanal | 2019-08-06 |
| 10296093 | Altering feedback at an electronic device based on environmental and device conditions | David L. Christensen, Thomas R. Matzinger | 2019-05-21 |
| D549766 | Combined stringed instrument and keyboard | — | 2007-08-28 |
| 7222293 | Professional time tracking and reporting system | Charles Zapiec, Mark Winwood | 2007-05-22 |