Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6138412 | Door opener and closer | William H. Rieckmann | 2000-10-31 |
| 5368435 | Side shifter attachment and retainer for lift truck attachments | Donald C. Morrison, Dean J. Mao | 1994-11-29 |
| 5217343 | Lift truck carriage | Alan L. Johnson, Emmett C. Frison | 1993-06-08 |
| 5088873 | Manipulator mixed freight handling system | Carl J. Ruder, Ronald J. Haney, Richard J. Chutorash, Arnold A. Zweig, Lyle B. Payne | 1992-02-18 |
| 5067867 | Conveyor for mixed freight handling system | Carl J. Ruder, Ronald J. Haney, Richard J. Chutorash, Arnold A. Zweig, Lyle B. Payne | 1991-11-26 |
| 5009560 | Mixed freight handling system | Carl J. Ruder, Ronald J. Haney, Richard J. Chutorash, Arnold A. Zweig, Lyle B. Payne | 1991-04-23 |