Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5894112 | Weighing scale apparatus | — | 1999-04-13 |
| D399144 | Digital turn plate | Karl J. F. Kroll, Bruce G. Rhoe | 1998-10-06 |
| 5664379 | Stairway step assembly | Paul Probst, Karl J. F. Kroll | 1997-09-09 |
| 5646376 | Aircraft weighing scale with improved base, platform and load cell mounting assembly | Mark Browne, Tom Bartsch, Randie Evenson | 1997-07-08 |
| 5232064 | Weighing scale assembly | Robert E. K. Kroll, Kai Kroll | 1993-08-03 |
| 5228527 | Force measurement assembly | Robert E. K. Kroll, Kai Kroll | 1993-07-20 |
| 4979581 | Low profile wheel scale assembly | — | 1990-12-25 |
| 4813504 | Load cell structure | — | 1989-03-21 |
| 4775018 | Load cell assembly | Robert E. K. Kroll, Mark W. Kroll, Karl J. F. Kroll | 1988-10-04 |
| 4714121 | Wheel scale assembly | Robert E. K. Kroll, Mark W. Kroll, Karl J. F. Kroll | 1987-12-22 |