Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9594888 | User authentication device | — | 2017-03-14 |
| 9160742 | Localized risk analytics for user authentication | Karl Ackerman, Daniel Wilder, Yong Qiao | 2015-10-13 |
| 9119069 | Near field communication based authentication | Yong Qiao, Karl Ackerman, Marco Ciaffi, Daniel Wilder | 2015-08-25 |
| 8752148 | Processorless token for producing a one-time password | Karl Ackerman | 2014-06-10 |
| D534448 | Authentication device | Robert W. Shaffer | 2007-01-02 |
| D517440 | Security device | Kenneth M. Gehalo, Carolus Gerardus THIJSSEN, William Wrightson | 2006-03-21 |
| D516929 | Authentication device | Kenneth M. Gehalo | 2006-03-14 |
| D511983 | Security device | Kenneth M. Gehalo | 2005-11-29 |
| D384449 | Blower outlet fitting | Robert W. Shaffer | 1997-09-30 |
| 5597290 | Multi-component fan assembly | Robert W. Shaffer | 1997-01-28 |
| 5452713 | Portable ventilator with reversible inlet fitting | Robert W. Shaffer | 1995-09-26 |
| 5337994 | Apparatus for mounting a portable ventilation fan to an access port | Mark S. Chumsae | 1994-08-16 |