Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6445192 | Close proximity material interface detection for a microwave level transmitter | Eric R. Lovegren | 2002-09-03 |
| 6006338 | Process transmitter communication circuit | Randy Longsdorf, Grant Bradley Edwards, Richard L. Nelson | 1999-12-21 |
| 5410730 | Interface controller for matching a process address field from a plurality of fields and generating a corresponding device address field | Randy Longsdorf | 1995-04-25 |
| 5187474 | Digital converter apparatus for improving the output of a two-wire transmitter | John A. Kielb, Richard L. Nelson | 1993-02-16 |