Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7108601 | Grain threshing device | — | 2006-09-19 |
| 4924407 | Humidity resistant meter reading device | Harley J. Staber | 1990-05-08 |
| 4475014 | Acoustical transducer | — | 1984-10-02 |
| 4387787 | Loudspeaker having acoustic impedance frontal loading element | — | 1983-06-14 |
| 4377219 | Loudspeaker having apertured acoustic impedance frontal loading element | — | 1983-03-22 |
| 4191865 | Loudspeaker padring and method of making the same | Douglas W. O'Brien | 1980-03-04 |