Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7862248 | Pen retention apparatus | David C. Brower, Selcuk S. Eren, Robert J. Heider, Dean Frederick Herring, Craig W. Turner +1 more | 2011-01-04 |
| 7488131 | Pen retention apparatus | David C. Brower, Selcuk S. Eren, Robert J. Heider, Dean Frederick Herring, Craig W. Turner +1 more | 2009-02-10 |
| 7410319 | Pen retention apparatus | David C. Brower, Selcuk S. Eren, Robert J. Heider, Dean Frederick Herring, Craig W. Turner +1 more | 2008-08-12 |