Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8523289 | Retention assembly for cutting bit | Eric P. Helsel, Donald E. Keller, Don C. Rowlett | 2013-09-03 |
| 8523290 | Rotatable cutting tool-tool holder-base assembly | Eric P. Helsel, Donald E. Keller, Don C. Rowlett, Wayne H. Beach | 2013-09-03 |
| 7883153 | Road milling drum having an adjustable width | Eric P. Helsel, Donald E. Keller, Don C. Rowlett | 2011-02-08 |
| 7883154 | Cutting tool with water injection to the cutting bit shank | Wayne H. Beach, Eric P. Helsel, Donald E. Keller | 2011-02-08 |
| 7547074 | Overlapping pedestals for supporting a block secured to a rotating drum | Wayne H. Beach, Eric P. Helsel | 2009-06-16 |
| 7475949 | Edge cutter assembly for use with a rotatable drum | Eric P. Helsel | 2009-01-13 |
| 6824225 | Embossed washer | — | 2004-11-30 |
| 6764140 | Drum mounting plate for cutting tool holder block | Duane E. Carson, Jr., Joseph Frear | 2004-07-20 |
| 6428110 | Cutting tool retainer | Cary D. Ritchey | 2002-08-06 |
| 6070945 | Cutting tool retainer | Cary D. Ritchey, Wayne H. Beach | 2000-06-06 |
| 5219209 | Rotatable cutting bit insert | John J. Prizzi | 1993-06-15 |
| 5143163 | Digging tooth | David J. Waite, Robert L. Frost, Wayne H. Beach | 1992-09-01 |
| 5141289 | Cemented carbide tip | — | 1992-08-25 |
| 5131725 | Rotatable cutting tool having an insert with flanges | Don C. Rowlett, Wayne H. Beach | 1992-07-21 |
| 5067262 | Digging tooth | Wayne H. Beach, Robert L. Frost | 1991-11-26 |
| 4981328 | Rotatable tool having a carbide insert with bumps | Ray C. MacIntyre, Daniel C. Sheirer, Wayne H. Beach | 1991-01-01 |
| 4941711 | Cemented carbide tip | — | 1990-07-17 |
| 4940288 | Earth engaging cutter bit | Wayne H. Beach | 1990-07-10 |
| 4917196 | Excavating tooth for an earth auger | Wayne H. Beach, Don C. Rowlett, Steven D. Shirk | 1990-04-17 |
| 4911504 | Cutter bit and tip | Wayne H. Beach, John J. Prizzi | 1990-03-27 |
| 4911503 | Earth engaging cutter bit | Wayne H. Beach | 1990-03-27 |
| 4817743 | Butterfly-type shim having semi-opened bottom and double sandwich braze joint produced therewith | Mark S. Greenfield, Raymond D. Evans | 1989-04-04 |