Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4457036 | Debris collecting mechanism | Alfred D. Carlson, Mark Snetting | 1984-07-03 |
| D273621 | Combination sweeper-scrubber floor machine | Alfred D. Carlson | 1984-04-24 |
| 4378855 | Multi-speed drive with forward/reverse lockout | Neil T. Brown, Keith N. Krier, Raymond C. Hawkins, Howard N. Seim | 1983-04-05 |
| 4365189 | Control circuit for reversible electric motors | Raymond C. Hawkins, Howard N. Seim | 1982-12-21 |
| 4262382 | Multi-speed brush control | Neil F. Brown, Keith N. Krier, Steven J. A. Waldhauser | 1981-04-21 |