Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10930170 | Piano cards music theory teaching method and apparatus | — | 2021-02-23 |
| 10121387 | Piano cards music theory teaching method and apparatus | — | 2018-11-06 |
| 8925226 | Roll of label stock with marks | — | 2015-01-06 |
| 7914214 | System and method for determining the status of a label in a roll of label stock | — | 2011-03-29 |
| 7712984 | Hybrid printer | David Block | 2010-05-11 |
| 7637678 | System and method for determining the status of a label in a roll of label stock | — | 2009-12-29 |
| 7275881 | Control of dual printing mechanisms | David Block, Patrick Reitz | 2007-10-02 |
| 7111806 | Spool for supply of image receiving medium | — | 2006-09-26 |
| D480678 | Dual ring set for knock-off wire wheels | — | 2003-10-14 |