Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887939 | Extension arm assembly for a tractor loader | Joseph W. Langenfeld | 1989-12-19 |
| 4859130 | Material handling attachment for a tractor having a multiple-point hitch assembly | Joseph W. Langenfeld | 1989-08-22 |
| 4797051 | Loader device for a tractor | Joseph W. Langenfeld | 1989-01-10 |