Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9575101 | Power monitoring systems and methods | Lan Xu | 2017-02-21 |
| 8493053 | System and device for measuring voltage in a conductor | — | 2013-07-23 |
| 8461823 | System for metering electricity by integrating in-phase current | — | 2013-06-11 |
| 8159210 | System for automatically detecting power system configuration | John Cecil Kuurstra | 2012-04-17 |
| 7940039 | Transformer meter and system for using same | — | 2011-05-10 |
| 6965225 | Coreless current sensor | — | 2005-11-15 |
| 6876245 | High speed bi-directional solid state switch | — | 2005-04-05 |
| 6549120 | Device for sending and receiving data through power distribution transformers | — | 2003-04-15 |
| 5510781 | Ultrasonic rotary shaft position encoder | Stewart deWalle | 1996-04-23 |
| 5065660 | Piano tuning system | — | 1991-11-19 |
| 4382383 | Pipe inspection device | Anthony Allen | 1983-05-10 |
| 4372161 | Pneumatically operated pipe crawler | John R. Boon, Michael P. Dolbey | 1983-02-08 |