Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8025504 | Display apparatus for teaching writing | Richard Freeman, Ed Annunziata | 2011-09-27 |
| 7531303 | Interrogating multi-featured arrays | Andreas Dorsel, Kyle Schleifer, Charles S. Ladd, Debra Sillman | 2009-05-12 |
| 7249950 | Display apparatus for teaching writing | Richard Freeman, Ed Annunziata | 2007-07-31 |
| 6406849 | Interrogating multi-featured arrays | Andreas Dorsel, Kyle Schleifer, Charles S. Ladd, Debra Sillman | 2002-06-18 |