Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10546435 | System and method of determining remaining useful life of an air filter | Richard A. Carpenter, Shawn M. Ryon, Shaobin Liu, Stephen J. Morey | 2020-01-28 |
PS
Phil Spengler
Overall (All Time): #2,772,734 of 4,157,543Top 70%
1
Patents All Time