Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8132983 | Riding concrete trowel with stabilizers | Richard Goldberg | 2012-03-13 |
| 7896575 | Soil compactor having low profile muffler | David Schulenberg, Jeffrey W. Dujmovic, David J. Waldenberger, Gary D. Goplen, Dawn Auby | 2011-03-01 |
| 7686538 | Portable vibratory screed with bubble vial inclination indication system | Richard Goldberg, Darrin W. Dauffenbach, Timothy J. Lickel | 2010-03-30 |
| 7172365 | Method of making and using a dynamically balanced walk behind trowel | Gregory Kruepke, Darrin W. Dauffenbach, Richard Goldberg | 2007-02-06 |
| 7052204 | Portable vibratory screed with vibration restraint | — | 2006-05-30 |
| 6974277 | Dynamically balanced walk behind trowel | Gregory Kruepke, Darrin W. Dauffenbach, Richard Goldberg | 2005-12-13 |
| 6012285 | Exhaust pipe with improved drain | David N. Hoffman | 2000-01-11 |
| 5993109 | Power trowel with counterbalanced trowel blade pitch adjust assembly | Robert M. Motl, Ronald R. Sartler, Darin Noyes | 1999-11-30 |