Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7601206 | Method and apparatus for generating water using an energy conversion device | Charles J. Call, Ezra Merrill, Seung Ho Hong, Mike Powell | 2009-10-13 |
| 7591980 | Biological alarm | Charles J. Call, Ezra Merrill | 2009-09-22 |
| 7578973 | Devices for continuous sampling of airborne particles using a regenerative surface | Charles J. Call, Ezra Merrill | 2009-08-25 |
| 7265669 | Networks with sensors for air safety and security | Charles J. Call, Ezra Merrill | 2007-09-04 |
| 6694739 | Modular water heater | Michael R. Powell, Seung Ho Hong, Charles J. Call, Ezra Merrill | 2004-02-24 |
| 6623603 | Method and apparatus for water purification | Charles J. Call, Alireza Shekarriz, Mike Powell, Seung Ho Hong, Ezra Merrill | 2003-09-23 |