Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4951172 | Method and apparatus for regulating air ionization | Michael G. Yost | 1990-08-21 |
| 4901194 | Method and apparatus for regulating air ionization | Michael G. Yost | 1990-02-13 |
| 4809127 | Self-regulating air ionizing apparatus | Michael G. Yost, Donald A. Gehlke | 1989-02-28 |
| 4542434 | Method and apparatus for sequenced bipolar air ionization | Scott Gehlke, Michael G. Yost | 1985-09-17 |