Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8534766 | Indexable cutting tool system | Cary D. Ritchey | 2013-09-17 |
| 8523290 | Rotatable cutting tool-tool holder-base assembly | Eric P. Helsel, Donald E. Keller, Don C. Rowlett, Stephen P. Stiffler | 2013-09-03 |
| 7883154 | Cutting tool with water injection to the cutting bit shank | Stephen P. Stiffler, Eric P. Helsel, Donald E. Keller | 2011-02-08 |
| 7547074 | Overlapping pedestals for supporting a block secured to a rotating drum | Stephen P. Stiffler, Eric P. Helsel | 2009-06-16 |
| 7530642 | Cutting bit with split wear ring and method of making same | Scott G Ferreri | 2009-05-12 |
| 6851758 | Rotatable bit having a resilient retainer sleeve with clearance | — | 2005-02-08 |
| 6070945 | Cutting tool retainer | Cary D. Ritchey, Stephen P. Stiffler | 2000-06-06 |
| 5647641 | Bar for a road milling drum | William P. Sulosky | 1997-07-15 |
| 5645323 | Concave cutter bit with sacrificial constraint | — | 1997-07-08 |
| 5639180 | Milled roadway surface | William P. Sulosky | 1997-06-17 |
| 5536073 | Road milling drum assembly and method of milling | William P. Sulosky | 1996-07-16 |
| 5456522 | Concave cutter bit | — | 1995-10-10 |
| 5429199 | Cutting bit and cutting insert | Daniel C. Sheirer, Don C. Rowlett | 1995-07-04 |
| 5374111 | Extraction undercut for flanged bits | Leroy E. Den Besten | 1994-12-20 |
| 5143163 | Digging tooth | Stephen P. Stiffler, David J. Waite, Robert L. Frost | 1992-09-01 |
| 5131725 | Rotatable cutting tool having an insert with flanges | Don C. Rowlett, Stephen P. Stiffler | 1992-07-21 |
| 5067262 | Digging tooth | Stephen P. Stiffler, Robert L. Frost | 1991-11-26 |
| 5007685 | Trenching tool assembly with dual indexing capability | Steven D. Shirk | 1991-04-16 |
| 4998574 | Cutting bit and block mount | Steven D. Shirk | 1991-03-12 |
| 4981328 | Rotatable tool having a carbide insert with bumps | Stephen P. Stiffler, Ray C. MacIntyre, Daniel C. Sheirer | 1991-01-01 |
| 4940288 | Earth engaging cutter bit | Stephen P. Stiffler | 1990-07-10 |
| 4917196 | Excavating tooth for an earth auger | Stephen P. Stiffler, Don C. Rowlett, Steven D. Shirk | 1990-04-17 |
| 4911504 | Cutter bit and tip | Stephen P. Stiffler, John J. Prizzi | 1990-03-27 |
| 4911503 | Earth engaging cutter bit | Stephen P. Stiffler | 1990-03-27 |
| 4850649 | Rotatable cutting bit | Robert H. Montgomery, Jr., Lawrence R. Burns | 1989-07-25 |